I don't think it's as simple as "females just aren't interested in working in technology." For one, I think are a lot of cultural messages aimed at women that as a group they are somehow less suited for STEM pursuits than men. This is well illustrated in an xkcd cartoon: in one panel two guys are at a blackboard working on a problem, and one says to the other "You suck at math." In the second panel, a guy and a girl are working at the blackboard, and the guy says "Girls suck at math."
For another, I've heard from a variety of women who work in technology about the conditions they face because of their gender, from minor harrasment to outright hostility.