If all instincts are misleading then what is the explanation behind humans and non-human species natural instinct to protect their offspring? What would be the livelihood of survival for an abandoned one month old, or 2 week old bear cubs if the mother dies? There is a fundamental difference in animal ethics vs. human ethics, one is based in instinct and the other in rational thinking.
However, by definition:
any of a class (Mammalia) of warm-blooded higher vertebrates (such as placentals, marsupials, or monotremes) that nourish their young with milk secreted by mammary glands, have the skin usually more or less covered with hair, and include humans. The differences in intelligence are clear but so is the fact that a human is still a mammal. The fact that this instinctual behavior can be observed in both human and non-human species undermines the claim that it is always misleading, or that it often does more harm then good. I think it overlooks the possibility that evolution can also be applied to evolution of instinct to compensate for the constant evolution of danger. Changes in laws are a good example, think of how many new laws in regards to cyber crime increased as technology advanced, or laws regarding transgenders. Proof that change is constant. If threats to our safety and survival are constantly evolving, is it not possible that our instincts are evolving to counteract them to survive?
If that's sounds ridiculous, Joe Kenda a retired Colorado Springs Detective solved over 400 homicides using the same intuitive style approach to solve cases that's currently under question in this forum. He states frequently he is using a gut instinct style approach, the evidence always corroborates the assumption in the end of course. However, that gut instinct wasn't off.