> a natural mammalian instinct

So what? I don't make decisions, and I don't think society should make decisions, based on "mammalian instinct". My standards are a little higher than that.

It's a common, but bizarre way to try to argue something is inevitable. You don't have to act like a cow, or even a chimpanzee - if someone says you do, it's not a compliment.

> it has a negative implicit meaning because institutional power should somehow transcend lowly animal instincts

It reduces outcomes and fairness because productive work is shifted to unproductive people who lack merit.