You say that as though there is some kind of settled scientific understanding of the "fundamental differences" between male and female personalities, or a certainty about whether such differences even exist outside the context of culture.

Of course one has to ignore the folk beliefs one's culture holds about gender if one is going to have any sort of a productive, scientific conversation - otherwise you are just rephrasing the same crap your parents learned from their grandparents, which is about as scientific as bloodletting or astrology.