There's a lot of Men-in-Teaching advocacy, in part because its thought having male teachers tends to be beneficial for male students[1].
I think stuff like that is the main reason to be worried about gender imbalances. A 40-60 imbalance probably isn't a big deal, but once you get to like, 90-10 or worse, as is the case with early education, you start to get a bunch of secondary social problems. Kids who associate learning as a woman only thing, or the culture around engineering or software becoming "boys clubs" that become uncomfortable for the women who do want to work in those fields
There's literally an American Association of Men In Nursing. Just googling "male teachers" gives me a ton of articles about the importance of hiring more men in teaching. Apparently NYC recently announced a huge investment into hiring more black/latino men in teaching or something?
I'm always suspicious of "you don't see much of x" in spaces where x isn't the demographic being catered to. This isn't Nursing News or Teacher News, not to say that Nurses and Teachers can't also be hackers, technologists, etc. but this is clearly not a space oriented towards all things teaching or nursing, so questioning community advocacy within their communities strikes me as the wrong place.
That's because their woman advocacy is really a not-so-hidden lobby to have woman making more money under the pretense of equal representation in all jobs.
We do accept it, for the most part. I don't see many Men-as-Teachers or Men-in-Nursing advocacy groups.