You aren't getting what you want if nobody in those demographics is choosing to get a degree in CS in college. I choose to believe this is a cultural problem (which is why Nigerians are even more overrepresented relative to U.S. population in higher education than Asians, despite being black [1]), but certainly there are many factors that play into it.

[1]: https://www.bloomberg.com/opinion/articles/2015-10-13/it-isn...