At what point do we simply accept what is blatantly obvious: there is, by and large, no "bias" against women in the tech sector. Women aren't under-represented because men are pigs and want to preserve some paternalistic male bastion. Women do poorly because women have historically shunned the tech and engineering fields. Most women don't like the field despite how much feminism tells us they do. As a result, they're usually less experienced and have less education in the field.
Note I'm speaking in generalities. This does not mean women are somehow intellectually inferior to men or otherwise unable to do the job. I've come across women in this field who are every bit as savvy as men, but I've come across very few women in total. As a percentage of their gender, I'd say there are far more women in the tech/engineering fields who know what they're doing than a percentage of males, probably because the women to do choose this field do it out of a genuine interest in the field and not some "if a guy can do it, I can do it better" impulse.
The tech industry, in my experience, is a very good example of a meritocracy. People who are good at what they do get promoted on ability with little or no thought to their gender, race, national origin, sexual orientation, or anything else (except age, and ageism is a problem in our field regardless of these factors). This constant cry for "diversity" and "equality" is a call to dumb down and water down this very meritocracy and it should be resisted at every possible turn.
We don't need more women, or more minorities, or more anything other than more well-qualified, competent technicians and engineers. If they happen to be women, or minorities, or [insert aggrieved group of choice here], great, but they have to be good at their jobs first.