That's the thing there are three (possibly four) states on the moral spectrum. Moral, immoral or morally neutral. If in moral philosophy you conflate what is both immoral and morally neutral we all end up in a state of perpetual moral infraction which furthermore doesn't reflect reality. As in truth as time goes less violence occurs, humanity progresses and greater advancements are achieved.
A moral principle is either universal or it's not a moral principle, so a class analysis that focuses on exclusively men, but not universally applied to to women falls down. I mean have as much class analysis as you want, have it with bells on, but any class analysis of women is howled at for being sexist. Take the gender pay gap when anyone tries to raise the spectre of women's choices that's howled at for taking away from all the evil sexist men.
Now for what it's worth I do believe there are sexist men and workplaces out there, but I don't actually credit them with the power to trully hold women down as to do so hands them more power than they actually posses. Women can and have broken through spectacularly in many fields like medicine, law etc and they will continue to do so as time goes on.
In a way my fear is a lot of modern feminist thought delivers the keys to the bloody kingdom of female power directly into the hands of patriarchs.