I don't think it is sexist at all to claim that some people would not want to be in a field because of its hostile work environment. I sure wouldn't. Factually debatable? Sure. But sexist?
> It might sound harsh, but I don't feel terribly concerned about keeping these displaced women in STEM; if their interest isn't strong enough to overcome a bad environment, then maybe they just weren't that interested to begin with
I'm not a woman, but I am a person of color. And if anyone expressed those exact sentiments about people of color, I would never want to be around that person again. "I don't feel terribly concerned about keeping displaced minorities in my field. If they aren't interested enough to put up with racism, they shouldn't be here to begin with. It is their own responsibility to do something about it and fix the racist environment that they are in". Can you even imagine someone saying that? And yet, I hear the same sentiments being directed towards women constantly.
Ironically enough, you and I probably agree on most things. I don't think the STEM field is "toxic" or any worse than any other profession. At most companies I've worked, both management and other engineers made great efforts to be welcoming and friendly to women. That said, misogyny and hostile work environments do exist, and when it happens, we need to make sure we blame the culprits and not the victims.