Because they are basing their lifestyle off different principles.
Meat-eaters who don't support human cannibalism most likely think along the lines that humans are more sacred, in some sense, than other animals, at least relatively to themselves (i.e: while some humans believe that humans are universally/absolutely more sacred than other animals, other humans reckon that while humans are more sacred, it is subjective/relative (i.e: the opinion: "other species would believe that they are the more sacred ones, and their belief wouldn't necessarily be wrong or right, but I feel justified/excusable in treating humans as more sacred, for they are of my kind")).
Most vegetarians/vegans would hold this view but would also hold an additional view that it is wrong to harm animals (including humans) [thought experiment: would the average vegetarian/vegan choose to save a human or any other given animal in a danger scenario? (Presumed answer: the human)]. However, many might find that vegetarians/vegans attempting to convert others to their adopted lifestyle wouldn't mention the first principle, because that wouldn't be tactical for their cause.
Things tend to sympathise more with other things similar to themselves. For example, some vegetarians/vegans care a lot about animals but don't give a damn about plants. Why? Well, basically animals are more similar to humans than plants are. Some vegetarians/vegans probably became that way because of sympathy to certain animals, but ended up applying that sympathy to all animals as a principle because it made sense at the time (and seems more virtuous). A lot of vegetarians/vegans will justify their lifestyle because animals have a nervous system (a great way to justify the principle), but let's consider what would happen if an alien sapient plant race came to Earth - are they more likely to sympathise with Earth's animals or plants? Ok, maybe they would be attracted to our sapience more than Earth's plants' cellular walls, but who knows. Regardless, sympathy levels resonate when the subject is of the exact (or I suppose at least really close to the) same species as the sympathizer, and this sympathy is related to how "sacred" one perceives things to be.
One can look at this situation as a tier or subset system - just as (the super great majority of) vegetarians/vegans find it ok to eat plants, but not ok to eat non-human animals or humans, meat-eaters who don't support human cannibalism find it ok to eat plants and non-human animals, but not ok to eat humans, where the different classifications are like tiers/(sub)sets. An example of this concept working in another field is as follows: some Christians would say that only Christianity is tolerable, while some would say that Christianity and other Abrahamic religions are tolerable, while some would say that any monotheist religion is tolerable, and etc.
On a different note, plants have done nothing to deserve to be eaten. If anything, humans are justified in eating herbivores as vengeance for the plants those animals have ate.
For some.
So is browsing Internet forums instead of working for society.
However, we humans have acquired the ability to exchange efficiency for pleasure/recreation, to a degree, and meat is tasty to me, and many other humans would agree.
There is no such thing as integrity. There is no such thing as preaching also. Those are very selfishly oriented and outdated notions, used to scare you. They are political and religious, not rational. But I can see why they are important, when one has to deal with many who are very deeply into such terminology (like Gandhi had to).
About "depriving" children of something, it is good also to think whether we are not deprived, by being fed it. Then comes the consideration, why have we been fed it, in the first place, was it with concern for our own health, or was it with concern for someone to feel good bossing someone else. The origin of choices makes them more clear. It is not really in our choice, to resist much of the choice, that's why I say it's not anybody's fault (including the bossing ones).
It's not that they "liked" meat, it worked for them to sustain population, at some point. They became less dependent of climate shifts. It was crucial for survival. (now it's not, and is even the other way) The whole idea of "liking" things is much more recent, and I'd say it is also an enforced idea (one person to dominate another gets them to claim they like something; it's a form of identification of ownership, marking territory of influence). Originally, you just explore things, and what you like or don't like, is temporary.
I would say the flaw in this argument is that everything eats plant--- aside from plants. It would be impossible to live a life without plants, yet, possible without meat. I don't think it's really about sympathy not to eat animals, it's the logic that we can eat animals but not human beings, another animal. If cannibalism was legalized I would certaintly become a meat eater.
I was having this chat in the tinychat designated area that I decided would be a good topic to actually branch out on. I understand cannibalism and veganism, in most cases, have nothing to do with each other but I wanted to link them together.
While it is possible to eat a completely plant-based diet [ with no animals involved], it is not possible to eat a completely meat based diet [with no plants involved]. If you are a meat eater, you are either eating a plant-eating creature or a carnivore that eats other creatures, and somewhere down the line of the animal food chain there will be an animal who has eaten a plant that indirectly effecting your diet.
To go further upon that, many vegans or vegetarians do not eat meat or animal products for moral reasons about harming animals- and yet, our current society is against cannibalism. I would move to argue that if a person is not okay with an animal being slaughtered, they are not okay with a person being slaughtered in the same manner. If this is the case, why is it that meat eaters do not support cannibalism? If it is okay to eat animals, but not okay to eat other human beings [ human beings are in fact animals just like other creatures] doesn't that prove there is some moral agenda behind meat eaters as well, an agenda, that does not seem to follow a coherent line of thought.
Imagine that we did allow cannibalism, and perhaps, instead of killing human beings for meat we ate our dead that were 'good'. Good, being defined as non-diseased. This would make HIV positive people invaluable, etc.
I would hypothesize that this could even make a market in third world countries, where people were making their dead into t-bone steaks and selling them- It wouldn't be a stable economy, and in order to keep up with the animal industry we would have to slaughter them at the same rate.
But hey. It's okay to eat animals.
Hmm...good point.It's not like people don't do that anyway.
I was under the misconception B12 could be received by the sun, as well.
The Germans are very good at it.It's not like people don't do that anyway.
sooo ok, let me get this straight...
is slant saying that cannibalism is the pinnacle of morality because we finally see humans on the same level as animals...?
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i, personally, have no problem with eating meat..
it's natural, food chain. ehh.. why complicate it with if's and but's? what's not natural is the brutal mass slaughtering of animals...
and as for the question of why don't humans start eating other animals if that's the case-- i also think that's that again is not a case of morality but that most species aren't inclined to eating their own. not that we're better that anybody else.
i have never seen a lion eating another lion. (but i guess if it was really hungry...)