1) Job availability and remuneration. CS is a high ROI profession currently. It pays well, has lots of open jobs for it, and takes relatively low investment to get into. If it wasn't so, they'd be much less talking about its gender gap.
2) The treatment of the minority gender in a particular field. There might be low males in primary education, but those that are in the field, do they find themselves at a disadvantage? Do they feel like the majority female create a toxic environment for them, making them feel uneasy about working in that field?
But I'll add one more:
3) People in STEM might actually be very open minded and progressive, much more open to talk about issues and much more interested in fixing them, and not letting bias be truth. This might be why you hear about women in stem and their difficulties, while you rarely hear about the difficulties of women in other male dominated fields.
No, they don't. They are given extra responsibility and promotions much quicker than the women. I think the staff division in our local primary school is something like 4 guys and 25+ women. Everyone loves them.
Perhaps not where you are. In the places where I have first hand knowledge (UK and Norway) people have been fretting over that for decades.
Personally, I don't even care about it, but it makes me pause to consider why I have to be so concerned about the lack of women in CS. Am I being an asshole and trying to shove people into a career they have no interest in?