Comparative advantage and sex roles

BP asks about applying a concept from classical economics to societal sex roles:

Thanks a ton for alphagame.  You've helped met turn a lot of stuff around.  Quick question: Do you think Ricardo's Law of Comparative Advantage supports traditional gender roles in that even if women could be better scientists, that they should still focus in child-rearing etc because that's where they excel?

Given that I am a fairly notorious critic of free trade and David Ricardo's theory - not law - of comparative advantage, I do not believe comparative advantage would be a sound basis for arguing that women should focus on child-rearing instead of science or whatever.  Especially when the argument is completely unnecessary, as we now possess massive quantities of evidence showing that the modern equalitarian system, which encourages women to obtain college degrees and pursue professional careers in lieu of marrying and bearing children, is neither economically beneficial nor demographically self-sustaining.

Of course, most women and equalitarian men will not believe this until they see, with their own eyes, what they once considered to be their society vanishing on every side around them.  That's fine, virtually no one in the Soviet Union was expecting the 1989 collapse of Communist rule either.  The problem is that one can walk through the math and talk all one wants about grade schools in London where no one speaks English, but very few people will believe it can happen in their city or their neighborhood until one day they step out of their house and find themselves surrounded by their successors.