The number and variety of knots “rationalists” will tie themselves into when trying to explain away the existence of discrimination and organized structures for enforcing that discrimination is really funny, and sad, and absurd.
Why is there never outrage the other way around with fields dominated by women, e.g., psychology?
The less simple response is that cis white men haven't been systematically kept from participating in the full economy, unlike women and people of color until about a generation ago. Systemic sexism and racism were built up over centuries and have not been evacuated from society yet. When engaging in discussion about it it's impossible to look at the entire scope and walk away with concrete actions to reduce its impact, which is why productive discussion needs to hone in on specific issues or else we get in meaningless argument over semantics like "#women < #men == sexist" when it should be obvious that something is wrong there
They're also deeply underrepresented in college, and the gap between men and women going to college is growing. Among young people, especially in cities, women actually out earn men.
Figuring out who's "better off" seems to be entirely dependent on what ruler you're using to measure "better", and which subgroup you're using to do the measurement.
(If I mis-understood what you're referring to please correct me).