What's your rationale behind your reasoning? I'd say we need people in this field who can actually take some heat, no matter shether they are male or female. There are certainly also plenty of guys who get driven away. Just have a look at how quickly some people get shot down on SO for submitting not-that-great answers.
Further, there are surely quite a few women around who are only around because they are women. In other words: their work is sub-par but they keep their job due to their gender. Just like we lower requirements for women in the military, we lower them for women in tech. Yet, there aren't many women signing up for the military. Maybe it's because they just aren't interested in the first place?