There are sites where the user split per sex is around 2:1. The female-dominated ones are generally more vapid than the male-dominated ones. You can check yourself. That is not to say that male-dominated ones are never vapid. To put it in other words, I would say that almost all female-dominated ones are vapid, while "only" the majority of the male-dominated ones are vapid.
Elsewhere: “Professor Pedersen believes Mumsnet’s popularity is partly down to it being a place where women can talk freely about politics without being drowned out by male voices or being subjected to the nastier side of other social media platforms.”
"females" is just the cherry on top.