Right-- and there ARE efforts to draw young men into fields such as elementary ed, nursing, etc. One perception problem is that once a field reaches some tipping point in gender disparity, it begins to seem "hostile" to the minority gender, and that can snowball to reduce numbers still further.
I don't think that anyone would seriously argue that male teachers or pharmacists are less capable of excellence than women in those occupations. But an all-female workplace that makes a man feel unwelcome is a problem, in and of itself.
Some STEM fields have this problem for girls and women-- when "early exposure" programs aimed at getting girls interested in those fields visit workplaces, talk to those IN the fields, they are seeing mostly male workplaces, and in the US, overwhelmingly WHITE and male workplaces.
Girls think about who they'll be working WITH and who they'll be working FOR. It seems to me that boys think about how they'll appear to others instead. Both things are a problem in gender imbalanced occupations.
