Your smarts don’t live in your brain. Comparing brains is a favorite job of scientist, but they are on the wrong track.
Instead they should ask questions that relevant… I wonder why they don’t think to answer relevant questions.
Questions like what happens when a really smart man has a daughter? How come that women, in general, are less capable, less able to make it in the world?
And the answer doesn’t live in the brain: it lives in the DNA.
Children inherit a combination of their parents’ DNA. A child can be smart, even brilliant as a potential, socialization will force a female child to shut down their capacities to please the parent, especially the mother, and dumb herself down.