Because women, as a group, are much less powerful than men – in tech in particular and in our society in general – blaming "hatred" on the weak party seems a little unfair, even if most men aren't intentionally sexist.
And you are absolutely right. Sex discrimination is systemic, probably starting in kindergarten and even at home. However, it's hard to fix education if young girls don't have lots of positive role-models to look up to, and you can't make those role models unless education is fixed. So fighting sexism has to be systemic as well, and at all levels at once.
And you are absolutely right. Sex discrimination is systemic, probably starting in kindergarten and even at home. However, it's hard to fix education if young girls don't have lots of positive role-models to look up to, and you can't make those role models unless education is fixed. So fighting sexism has to be systemic as well, and at all levels at once.