It's the forever-aloners who spent half a decade obsessively learning how computers work before college. If the women you're talking about are being driven away by something so tangential as the culture (which isn't between you and the keyboard), do they still have enough insatiable curiosity to be coding alone as a hobby? If not, how do you figure they have the aptitude?

We need more qualified people, but mostly fewer unqualified people. Most of the men we already have are worse than useless, and I don't want to attract anyone who isn't markedly better.