We're not talking about pros here. In some amateur leagues, you'll find a few teams that seem to dominate. They are usually the ones who take it more seriously, and actually train and practice. I don't know how you could keep individuals bracketed by their level of competitiveness.I don't know. I think that if the "gotta win" crowd isn't in your bracket, more people might go to tournaments.
Going back to my baseball analogy, how many local softball leagues would there be if there was a law that required you to allow professional baseball teams to compete against you?