Perhaps women choose not to study computer science because they feel it'd be overly difficult to get in to an industry made up of 80% men. What if the fact there are relatively few women tech workers is the reason few women study it, and not the reverse as you're inferring.
What is abundantly clear is that young women and men are influenced by cultural norms and act accordingly when choosing a path through life.
Most servers/flight attendants/nurses are women. At my sister's nursing school graduation, there was only a single man on stage to receive his BSN and he was a former medic in the Army.
What gives? There are plenty of women doctors now. Why don't men find nursing to be a rewarding and satisfying career option?
Maybe at one point they didn't, but thanks to Twitter they are now told how horrible it is.
Not sure why this post is being downvoted. The lack of men in nursing is a real problem in that field, and the post builds up to this in a way I don't necessarily agree with (I think the tech industry's cultural appearance outside of it is completely garbage, and I think most folks know it) but I think is worth rolling around in one's head.
Male nurses (again, this is anecdote from my sister) are handed the most troublesome and aggravating patients with the assumption that they are willing to be "rough" with them (and the implied threat to the patient is that if they are nice, they get the pretty nurses to come back). They are given the jobs that require heavy lifting (like moving patients) in a medical setting and are subjected to vicious gossip campaigns about their sex lives.
I've worked in an all-female IT department. Six women, one guy. Believe me I've got stories. Not all internet gender-memes are universal. All experiences are valid and inform the debate. Even those that don't conform to the proffered agenda.
We need to be a little more empathic all-around. It's not a contest to see who can be more outraged or oppressed.
As a counterexample, I offer the military industry. Under your hypothesis, the all-male military would have remained as such forever, because women would have seen the near-0% proportion of females in the military, and would never have attempted to join it. So how did the military get up to about 15% women?
Clearly, it was because at some point a decision was made to actually accept those who attempted to enlist, and not because the industry already had enough women in it to encourage the attempts to be made.
Nevertheless, it is still a perfectly testable hypothesis, and an experiment might still be in order before we go around saying it's no good.