Also, I'm not attempting to refute Dave McClure or anyone specific. I never claimed that he claimed we should strive for 50-50 equality, so it's unfair for you to accuse me of a straw man. I'm just making reference to an argument that happened to affect my personal view on the matter. This topic has come up again and again on HN and in tech-related blogs, and I think it's a very common viewpoint that any deviation from a 50-50 distribution is attributable to discrimination.
Regardless, I agree with you that that current ratio is overly-extreme, and that we can do better.