Asserting that a gender balanced field is less sexist than a gender imbalanced one isn't very interesting. The interesting part is that law and medicine used to be just as gender imbalanced, and then steadily became less so.

This is the crux of the issue that you're avoiding grappling with. Saying "well I don't care about the history" is irrelevant, it's still the most important part whether you personally care or not.

It's like looking at which countries are desirable to immigrate to without grappling with patterns of development, despite the obvious fact that the biggest thing that makes countries more desirable is being rich/developed.