do you even have to ask the question when everyone knows they're not
it's very, very difficult to undo gender stereotypes that have existed since the beginning of time, so even if women 'can' theoretically do a job associated with men, and men 'can' theoretically do jobs associated with women, they generally do not because you're taught from a young age the gender roles in the workforce just from looking at society around you.
a Swedish study of 1,327 secondary school students looked at why more boys are attracted to Stem subjects at university and more girls are attracted to subjects in the Heed (health, elementary education and domestic) spheres.
'this difference was partially explained by “social belongingness”: teenagers felt they would fit in better in subjects that had more of their own gender. but another important factor was “self-efficacy”: the belief that one can succeed in a domain. we tend to approach domains where we feel we are competent and avoid those in which we do not. boys and girls both had high self-efficacy in the Heed subjects, but boys chose not to pursue them. the researchers suggest that this may reflect the low social value and rewards associated with careers in these spheres.
'in contrast, girls on average had much lower self-efficacy ratings in Stem, despite outperforming boys across school subjects. even in one of the most gender-neutral countries in the world and despite the evidence of their own marks, girls still seem to be succumbing to the stereotype that girls aren’t as capable in these subjects.'
https://www.google.com/amp/s/amp.theguardian.com/science/head-quarters/2018/mar/08/bridging-the-gender-gap-why-do-so-few-girls-study-stem-subjectshttps://link.springer.com/article/10.1007/s11199-016-0694-y so basically if you have no or few role models of the same gender, you're less likely to pursue that career. some people care about women in STEM (and i can see why) but idk how many generations it will take to get enough role models in, because it also takes a shift in the way men see so-called 'men's work' and so-called 'women's work' as well.