There are multiple ways to answer the question:
1. I often don't fit in - and don't consider this as a problem.
2. I have yet to see a woman studying a STEM subject who is very skilled at it and made such complaint.
3. Saying one does not study, say, computer science because one does not fit in means that "fitting in" is more important to you than the things you learn in computer science. In other words: You don't consider CS as something really important to you. This is clearly not the inner urge for the subject that I expect from people studying it.
Seriously, you should actually talk to some of these women about their experiences.
> Seriously, you should actually talk to some of these women about their experiences.
I have.
Yes, being an actual liberal in SV and not just a Dem apologist...
My peers in undergrad computer science were as you described, except I would estimate 60-70% Americans, 95% male 5% female.
I now work for a small-ish company with ~25 developers on a few different teams. All men.
I understand that this is anecdotal, though not uncommon.