Just Silicon Valley?
Or sexism is still big part of our society? IMHO the issue here is that women working in tech have an head over their shoulder, a brain inside, and use it - so they're outing a problem that exists across many other sectors, just in some - i.e. sport, fashion, music, entertainment, media - it's thoroughly hidden as much as possible, to avoid to kill the golden eggs chicken.
Meanwhile, images of women as "sexual prizes" are more and more used by media to attract people and make money - especially men (but also women using those images as role models). Often by the same media blaming sexism... then, how do you believe men with more money then neurons will act?
Especially since we're returning to a primitive ape society where your power is measured on the size of your mating harem. We are a society that is obsessed about sex - and we are seeing the nasty outcome.