[nadam]

I don't have evidence why they do not choose tech carriers. But I know that as a kid I was fascinated by being able to program a computer. I have seen many-many likeminded boys in the demoscene (in eastern Europe), but not a single girl. (Entrance was free for girls on demo parties, while boys needed to pay.) And it was absolutely not a career choice, we did not care about the money or a career, we just enjoyed to program, or more precisely we just could not imagine not to program. I never knew why girls do not program but I assumed that they are not that interested. And not just not interested in programming, but also not interested in boys who program. This was 30 years ago. (Things changed since then, it is more cool to be a programmer nowadays.)