Because it has nothing to do with "being nice". That argument is an outright lie, and everyone knows it. When A is telling B to STFU because they're a victim that demand is 100% about assuming dominance and control in a manner they are incapable of earning on their own. Nobody on either side of the argument has any reason to submit to the other, for any reason other than the expectation of getting the same in return.
I can hit you but you can't hit me is a chick move, and it doesn't apply outside of actually hitting a chick. And the only reason it even applies then is because men and women actually aren't equal that way.