I have found male programmers to have a more diverse dating/marriage pool, though most are still "tech"-y office jobs e.g. designer. That's just middle/upper middle class sticking together though.
Female programmers I've met almost exclusively date or are married to other programmers.
So, female programmers pretty much get the pick of the pack among their peer groups. (Not judging, just stating statistics)
The other 80-ish% men in programming still need to find love somewhere, so they cast a wider net.
Tech communities are all-encompassing to begin with. Tech cities, tech friends, tech hobbies, tech side-projects..... I need out of this echo chamber from time to time.