Yes it's established. I think it needs to be yet more established.
I have no problem with measuring and classification itself. It serves its purpose.
However it could be argued that the inscrutable nature of
g factor and IQ from the perspective of the uninformed is what causes the damage.
This is related to a lot of absurd biases, and difficulties with symbology itself. There's the map-territory relation problem, where people confuse the model for that which is modeled, the dictionary problem, where if you don't know any words in the dictionary, you cannot understand the definitions - how do you learn the words then? Plus other issues with symbology and misguided attempts at 'intelligence' such as hyperforeignism and hypercorrection, where people try to be so correct that they end up being wrong.