2) who's even suggesting that we need a 50/50 gender balance? Where are you getting this straw man from? All McClure has asserted is that there should be more women in tech, and given our 9:1 M:F ratio... there's a lot of room to move before we even start to discuss whether 50/50 is an appropriate ratio.
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.