One, they've been of less value in first world countries for the past sixty years. Call me a pessimist, but I'm not sure if this trend will continue. Two, fitn

One, they've been of less value in first world countries for the past sixty years. Call me a pessimist, but I'm not sure if this trend will continue. Two, fitness signals health, which is valuable. Three, even if fitness isn't valuable, we think it is, which makes it valuable for at least selfish reasons. Through most of history, fitness and ability have correlated strongly to attractive and charisma. Nobody's gonna give you social status or bear your children for getting all the achievements in Fable 2. (OK, some people might, but not very many.)