Beauty parlor is not a women's exclusive platform, it just contains lolcows and topics primarily enjoyed by women.
A subsection of the community will screech over any discussion women try to have about women stuff, rendering such discussion impossible in other areas.
Imagine if every thread about what Chris was currently doing was endlessly shat up by people who just keep on harping about trannies instead of talking about Chris, because Chris happens to be a genderblob - it'd render any thread for discussing what Chris is doing atm useless for its intended purpose. Imagine if the Patrick Tomlinson thread would derail into endless "hurr durr libtard politics" sperging because Patrick happens to be a lefty.
The regulation in BP does not stem from women needing the platform for themselves, the regulation stems from some people, primarily men, being unable to stay on topic.
I've posted in the man-hate thread and a couple of other BP threads and never been banned, even when I had dissenting opinions - you just stay on topic and don't act like a screeching retard, it's not that hard.