I do not necessarily agree with my grandparent comment, but are you advocating going out of your ways to find a problem out of statistics?
I'm also fed up with the whole "sexism in tech" bla bla. I don't want more women in tech. I want more talented, more dynamic, more interested or more passionate people in tech. More humble people. More beer lovers (there's no such thing as too many beer buddies). More video game players. More runners I can go jogging with. More team players. Less people only in it for the money. Less pointy haired bosses. Less consultants and less auditors.
These are my own personal preferences and guess what? In each single case I don't care about the sex of people in the industry.
By now, the "sexism in tech" has caused much more gender segregation than it did any good. Now we're afraid to talk at a conference or at the office. We never make any joke that might be remotely sexual around female coworkers (note that my female friends usually take it really well).
So to answer your question, we should be satisfied with that explanation. More women want to come, they're welcome to join. It's not going to be easy for them, but guess what, it's not easy for guys as well.
And to make one last thing really clear: I believe that there are a few problems women deal with in the industry, and we should be doing something about them. I'm thinking about uneven salaries or about the way they get treated if their nickname is ever slightly girlish.
So to make it clear, I care about women already in the industry. We should help them with these minor inconveniences. But I'm not going out of my ways to figure out why aren't women joining and what should I do to help them.