I'm not sure if I understand your point, but the point is there's a kind of credentialing treadmill where once women get into a particular field or class of institution it loses prestige and men flee to alternatives which become more prestigious. An example is undergrad biology becoming predominantly women and being seem as the "easiest" STEM major.

I think if you see a majority-female CS class graduating from Stanford it is a sign that VCs and other power brokers will begin weighting that credential less.

This is complementary to the anti-intellectualism that's already baked into fascism. Rich people like Peter Thiel have already started paying people to "not go to school" as an anti-intellectual backlash against inclusion and diversity.

Can you get a good job with only a 1st degree in biology? I doubt it.

I may be cynical but I don't think men flee fields were women manage to enter. I do see this trend though. But I rather see it as men moving to the next cool thing, leaving the leftovers of their no longer prestigious / downward trending field for women to finally enter, who may see it as a victory without realizing the goalpost has yet again shifted on them/carpet has been pulled from under their feet already.

Much like women no longer qualified as gamers for playing the same games that men grew up with (point n click, puzzle games...) because men flocked to newer genres since (actions/shooter) Bit of a dated caricature but fitting imho.

If men wanted to keep women out, it is easily managed, case in point programming was seen as secretarial work until men decided it made good money and they should appropriate it.

(Fully expecting to be downvoted for saying this)