Completely unfair for the same point.

Much more likely it's the same story to start girl nerd groups as a whole: More than likely; the main reason girls need their own nerd groups for just girls is because they chose this group in the first place because they wanted to shut up and talk about this thing they like, and being in non-sex specific nerd groups makes them know damn well any person born a man allowed into the group is inevitably going to try to fuck them.