Tennis is still very successful in spite of itself.
The dumber you are on court, the better you're going to play.
When you lack cohesion, it becomes difficult to have a clear marketing strategy.
Tennis doesn't encourage any kind of intellectual development.
Focusing on one thing can be tough, and people with fewer options are more apt to concentrate on what they're doing. There's probably something to hunger.
Fear is an interesting energy that we all have to face. Some people step up and aren't afraid but still come up short. And some would rather cop out: "My shoulder hurts" or "I didn't give it my all." They can sleep at night.