Having a kid and their gender is pretty much as random sinment as it can get. There's no logic really in making the half of the species that you feel is doing all the oppressing into an even more defensive, aggressive opponent. Telling half the population that we hate them, even in jest, is not the way to do that. When feminists joke that they are miss andrists, they are riffing off the misguided popular notion that they are man haters.