Because they are subject both to sexual harassment and to higher expectations, including "professionalism" (not using profanity at the workplace in this specific case).
Smug responses like this just means you don't actually have a point.
How does it not answer the question "why would women avoid fu over foo"? I thought it was clear that "fu" means "fuck up" or even "fuck you", a sexual swear word, while "foo" means nothing at all.