> They are finding the best female developers. There just aren't that many (for whatever reason)
This sounds like you think companies don't have an obligation to improve their environments so that women feel included. Consider a developer that you would say is among the best: would she accept a position at your company? Why not?
The implication here is that earned (through training) software and programming skills are equally distributed among the entire population. This is simply not true just by looking at StackOverflow/CS major demographics.
They are finding the best female developers. There just aren't that many (for whatever reason)