[Propertarian]

Whether or not natural selection is still exerting pressure upon us or not, it moves so,so,so slowly that we still have largely the same hardware as we did tens of thousands of years ago i.e. that one in which women's fitness is based primarily on appearance and men's fitness is based on "success". Ever heard a straight woman say: "women are more beatiful/better looking than men"? More than half the women I know have told me that.

Personally, I think societal pressures are pushing women to try and become "sucessful" and to "think more"; things were even worse in terms of "smart, skeptical ladies" 50 or 100 or 150 years ago, and it wasn't natural selection that changed it (it doesn't do anything noticable over such a small time period).

As for your whole equation, a sexy woman simply has very little extrinsic incentive to become good at anything else. Being sexy alone gets them good mates and $.