To be fair, if you accept the premise that Silicon Valley is driven by power and prejudice rather than merit (for the record, I reject it), then clearly, pg is part of the problem. That doesn't mean you reject his argument, it means you ignore it as an irrelevant analogy.

I think it's a lot more interesting to take pg's argument in a different direction. If you accept the premise that intellect is evenly distributed regardless of race or gender (for the record, I accept it), then why is mathematics dominated by white males? Because it's an observable fact.

Start applying Five Whys and see what happens.