because any sort of material, sociological or biological account of human society runs into a wall of Enlightenment-era type individualism and people don't like that.
I mean in terms of people using it to advance some kind of racial politics it's actually obvious why it's offensive but one of the funnier E.O. Wilson moments I recall is a Youtube video where one commenter accused him of promoting communism by means of teaching about eusociality in ants.
