Now, let me just dispel a myth you stated. You believe that "Given two equally talented people, the one that pursues a goal obsessively, for well over 40 hours

Now, let me just dispel a myth you stated. You believe that "Given two equally talented people, the one that pursues a goal obsessively, for well over 40 hours a week, is going to achieve more." This works for people like Carmack because he's always gotten to choose precisely what he wants to do in each of those 40+ hours.