Do they? That suggests not only that there's one right way to be a man/woman, and that you'll need to learn it from your peers and not just your parents.

I do think there's a point to gender-segregated spaces for kids, but that is because the social dynamics are different. There are some ways a boy can relax when there's only other boys around, and same for girls, and that's probably good for mental health. But you're still a man/woman even if you didn't get that chance and went through your whole childhood worrying what the opposite sex thought of you.

to learn that both genders are normal people and have some common and some diverse interest and capacities. to learn to respect each other and to collaborate. to avoid turning the other gender into a mysterious unknown.

there is room for gender segregated spaces. but it doesn't have to be at the organization level. you could have boys only and girls only patrols.

i also disagree that men need to be by themselves in order to learn to be men. the most important quality of a man is to be able to treat women with respect. and see them as their equal, not as something lesser. that can only happen in mixed spaces.

gender specific spaces are good for dealing with certain experiences, such as puberty, but beyond that y experience is that male only spaces are a breeding ground for toxic masculinity.

i also reject the idea that boys can't think straight when the see a woman. that only happens when those boys don't have enough contact with women and are not used to them and if they had bad role models (so blame their parents). if that was a serious issue all schools would be gender segregated everywhere. the whole idea that boys can't control themselves is insulting. it's perpetuated by an archaic view of gender differences. and in fact telling boys that they don't have themselves under control is only making them feel more helpless than they really are.