Is it? What if American graduate schools stopped over-producing PhDs, which they can do because more than half the engineering and math PhDs awarded in the US are given to foreign nationals? Then more Americans might go into graduate schools in science, math and engineering. Right now, a typical starting salary for a PhD in math in academia is in the 40s. That's pretty small money for that level of expertise. New business prof salaries are in the 60s or 70s. Salaries in math are that small only because there are too many PhDs on the market in that discipline.
Despite the feminist fantasies, it is mostly boys who pursue these science and engineering degrees.
For the last decade or so, close to 30% of the new PhDs in math in the US have been awarded to women. My own discipline in mathematics, wavelet analysis (an important new area in applied math), was revolutionized by a woman, Prof. Ingrid Daubechies of Princeton University.
In computer science - my field - a lot of graduate students are foreign, yes. I don't know a single one who plans to "go home" when he's done. Most of them aren't getting financial support, either. Their tuition helps pay for my assistantship.
So when we're done, I'll be competing with "foreigners", yes; but foreigners who have been in this country for years and are largely acclimated, who want to work for the same wage, not less. And apparently there's no lack of jobs for CS Ph.Ds - I understand the starting salary right now is around $90,000 - that's not an indicator of an overfed market.
Don't tell me anecdotal evidence about individuals. It is a fact of Nature that the outliers on the intelligence bell curve are overwhelmingly male. Our outliers on the high end are being systematically suppressed. This has consequences, and will have more consequences as time goes on.
While there are more women in math, science and engineering than there used to be, science and engineering are still by far and away masculine domains.
There is something about the way women's brains and men's brains work. Men do much better with 'spacial'/concrete tasks. Women do better at relative and subjective tasks. Writing and Language and health care are often women, while driving, building, designing and construction are often men.