You hit the nail on the head. Just from my experience, most (OK all that I know) wives of high income men have careers. Rich people can’t seem to have too much stuff. I’ve noticed that the new “trophy wife” has a trophy career, physicians seem to be at the top of that list.
FWIW, this has nothing to do with liberals vs conservatives. Among university academics (pretty much all liberals) stay at home mothers are common. They’ve seen the research.
Maybe they should have a draft for women, then we guys could go on extended fishing trips, etc.