I sincerely apologise for responding to the point that you made, rather than the one you meant to make. My psi abilities are weakest around the full moon.
reconsidering your two new points that you have made there,
(a) many women make decisions on whether to enter a field based on some absurdly gross overgeneralization of that field
(b) women more so than men make decisions on whether to enter a field based on some absurdly gross overgeneralization of that field
Well, I think that (a) is probably true, but is also true for men. And that if (b) has any measurable truth to it I would strongly doubt it to have any statistical significance.
However if you pick any way to divide a large group into two (size of ears, for instance) and then measure something unconnected to that division, you will almost always find a small, measurable, but insignificant difference.