I think the main epistemic problem is that the explanatory power of the null hypothesis (men and women are natively psychologically almost identical, but people know that women get pregnant and men don't and social structures take this into account) is pretty high and, even worse, often gives reasoning that's isomorphic to ev psychic explanations.

So your null hypothesis is that genetic evolution failed to produce any traits in humans that accommodate this fact, so all behavioral differences are the result of memetic evolution and explicit reasoning. This hypothesis strikes me as extremely unlikely.