"…dominant culture that discourages women from even entering a computer lab filled with sweaty nerds, much less think about joining them."
You have a good point here, but it's not just that they're sweaty, it's that all too often they're actively hostile to women – whether it's sexist jokes, an obsession with rape in DND games (all too frequent) or just the way they seem shocked that a woman could actually be good at coding. Makes things a bit unpleasant, yeah?