Going by your extremely tenuous suggestion that genetics is an accurate predictor of math/engineering aptitude because of how people of certain ethnicities or sex perform on the SAT, we should have a distribution in tech that looks like this:

- Asian/Pacific Islander = 29.6%

- White = 26.4%

- Mexican American = 22.8%

- Black = 22.1%

- Men = 51.6%

- Women = 48.4%

In other words, roughly equal numbers of all of the demographics (specifically _not_ an overwhelming majority of White Men).

So even if your argument were valid it seriously undermines your point.