I think you're misreading it.We don't think all men harass women,only some.When you first get in a game with a man,you don't know if he will be one of those guys or not,so for some women they would feel more comfortable playing with other women to try and avoid that sort of situation. It's not about women only playing with women and never playing with men ever again.It's a very casual clan.Sometimes girls just wanna have a ladies night,so now they know where to go if they want to round up some troops for that.