If you are a professional it just might be that. A lot of artists and athletes have insurance contracts that require them to only do work when they are working. This is why you'll rarely hear of a basketball player doing a pickup game. A sprained ankle or blown knee off the court and they can, really, lose everything. Most of them do enjoy the game so they'll play in disguise or an alias.

When millions of dollars are on the line, sometimes, your passion can become your prison.