But yes it's maturity.
For girls and young women full stop.
The eagerness to keep in favour with the group you fancy (if het) is strong. And that is across the board as far as I've seen in my life. And I've got around a bit, as it were 
I think it's a combination of-
Wanting to be seen as a girl that they can hang out with.
Not having had the years of it all grinding you down till you think that's it. It's still black and white at that age. These blokes and those blokes are not the same species.
Optimism that it can't be that bad! When it comes to being a girl/ woman. I mean. That's too much. My friends are all lovely! Something can be done about the bad ones. NAMALT.
The way blokes bulldozer their arguments, get fucked off at disagreement esp a girl. They lecture. Are you with me or not? You're not one of those awful types everyone hates surely.
If political, seeing this as like homophobia and that's shouted in all the things you go to for leftyness.
So in the end I suppose that's why it seems to be certain types of girls and women. But it's not because they're protected etc. It's because if they are teen / young women and into politics and left wing. Then the men they are friends with, the groups that are in, the people they listen to and support are all hammering one message.
And they are too young, too black and white etc to not accept it wholesale. And even questioning would lose your entire friendship group etc.
So in the end it's a function of girls from certain backgrounds and in certain social groups that end up with bonkers ideas.
And IME the place to find politically engaged fervent lefty girls. By no means always obv. But IME usually. I'm from North London. I'd say certain expensive more bohemian areas with a strongly left population and going to any local school because the area means the students have that background.
So there's the error.
It's not about not having bad/ terrible experiences with men.
It's to do with those boys and girls being immersed in a certain scene completely.