"Reservations" or whatever you want to call them are lowering the bar to the same level as other people, but of course the "B"s are going to scream blue murder because they now have to work instead of cruising.
Why are they a minority in tech in the first place? Well video games got me and most of my friends into tech, and when I was in high-school in the mid 90s most girls abhorred games and considered them childish and geeky. It was a serious social faux pas to be a tech geek who loved hacking around with computers and playing video games. I never met a single girl in the 90s who was into it beyond playing an occasional game of Mario Kart.
Who are we to blame for that?
The problem needs to be fixed at the middle school level (or earlier) where girls are discouraged from technical subjects.
In all my four years of Engineering course. There wasn't one single girl in all four batches of Mechanical Engineering branch.
Are there cases where a talk from a woman was judged not because of its merit but because the speaker's gender?
If all woman who have good talks are getting their chances, I don't even see a problem here.