No, the point is that you can't assume "unwashed CS nerds" are troglodytes towards women while simultaneously trying to say tech doesn't have a problem with women.
Your final paragraph is particularly telling. Re-read it and think about the equivalences you're trying to draw.
Edit:
>The point is that the distribution of genders are likely overwhelmingly male.
Do you just intentionally ignore the fact that without there being a differential rate of harassment between people on the basis of sex that this doesn't matter in the slightest? Your argument assumes the point you're trying to argue against.
No one said unwashed CS nerds treat women any differently to other men. The point is that the distribution of genders is likely overwhelmingly male. Thus even if a small percentage of that male population exhibit sexist behaviour, the tiny proportation of females would get most of the abuse, and more abuse than the average male.
Work on your reading comprehension before spitting out snark.
Namely because that unstated premise is almost exactly the conclusion of the argument you're trying to argue against.