Honestly another reason why I don't consider psychology legitimate is the invention of "psychopaths". It's a term invented by people who operate by purely empathy-based "morality" and is clearly just an ad-hoc way of them saying that their hedonistic, and completely unrestrained, lifestyle, won't lead them to become evil monsters, because evil monsters, according to them, are literally born completely different than them, and therefore they're in no danger of becoming them, no matter how bad they get.