From my perspective as a software engineer, we work in a male-dominated field, and we've made the work culture and norms what we want them to be [1]. The few women who do end up on engineering tracks often leave, and in a lot of cases they move into engineering support roles (dev evangelist, marketing, etc.).
I think Adria Richards is a loud, exceptional example that doesn't tell the story here. The reality is, this is a very quiet, insidious problem; women are walking away from our field, or just not showing up.
I don't believe that half of the best of the best talent pool just doesn't want to do engineering like the other half. There's a reason they're disinclined, and I accept that I'm part of it -- I'd like to see it change, and I think we have a responsibility to do better. I believe that as an industry, our future suffers for it.
http://www.usnews.com/news/stem-index/articles/2015/06/29/ge... [1]
In 2013, only 26% of computing professionals were female — down considerably from 35% in 1990 and virtually the same as in 1960. While the percentage of women in engineering has risen since 1990, the progress is modest –rising from 9% in 1990 to 12% in 2013.
http://fortune.com/2015/03/26/report-the-number-of-women-ent... [2]