Etymology doesn't exist separately from the meaning of the word. If something is called "womanism" (the literal translation from Latin), that means it actually does have to do with women.

Yes, I have heard a lot of feminists talk about also fighting against patriarchal expectations placed on men, but again the opposite of patriarch is matriarch, not gender equality. So women are still considered victims and men are considered aggressors - or victims of other men, for that matter. It's still in essence a fight of women against men. If it wasn't, it would be called something else. For example, humanism, because the word "human" makes no gender distinction.