I can't reply to this at all because it made me very, very angry. But feminism, in fact, does get involved in doing. Unfortunately, feminism can't force men and women not to be sexist. You can't act in ways that make your professor or your employer or your coworker or your customers less sexist. Sometimes, though, you can point out to them that they're being sexist, or their superiors, and then something happens. Sitting around saying nothing because it'll just piss people off, or whatever, is exactly the wrond attitude.