I call BS. Sports develop of a lot of skills that are vital in the workplace and in life (teamwork, working with colleages with differing backgrounds, hard work, self-motivation, self-discipline, building trust and professional relationships). Dan, did you play team sports at a varsity level? There is a reason that people who did not play (several) sports don't like them, and people who did look back fondly on them. Maybe you never possessed athletic skill (which is still no reason not to try to find a sport you like), were jealous of athletes, or are snobby and believe that "jocks" are all stupid. Athletes are a cross-section of society; there are good and bad, smart and stupid. But the benefit of team sports will never change.
You're not going to get a lot of love on a sports message board. That Tim Duncan played several sports, and he turned out to be a pretty good kid.