Earlier quoted context omitted.
Yet, the preferential difference in expressing themselves implies that genders are not identical after all, an idea that doesn't get treated as a truism.
I don't know anyone pushing the notion that genders are or should be identical.
So, to reply to your renark: many people in the social sciences think genders are equal at birth, and many other people think that this alleged equality should be somehow preserved by society.
Luckily, data from life sciences seems to contradict this construction.