I'm not trying to forbid anyone else this general class of imaginary societies in their work. I have just spotted it as not interesting to me.
I wonder how much of this is generational. I think women of my mother's generation and older were flat-out told "girls can't _____" a lot more often than I was, growing up. Even the person who tried to get me not to be a physics major didn't try to tell me that girls couldn't, just that I would, in her estimate, be a lot more comfortable in a field with more women. (Showing pretty clearly that she knew me not at all, but never mind that part.) And I can see where if you'd heard that girls can't this and girls can't that, exorcising it in your work might have a great deal more appeal than if obstacles were subtler. Anybody care to be a data point with their own age and attitudes (and, if it seems relevant, gender) in this regard?