Don't know why you're getting downvoted. Matt's point is completely correct that we can transcend our biology, but it's a MASSIVELY powerful force and constantly underestimated by people. I think people just don't like the idea that the default behavior of most people is hardwired and unpleasant.

Also, the HN crowd probably underestimates how much the average person makes knee jerk decisions based on evolutionarily-driven intuition - this community is very conscious, reflective, thinking. It's easy for people surrounded by the best, brightest, most thinking, most analyzing people to forget that the vast majority of people aren't that way.