2 reasons:
1. I think the problem can be solved with a universal score sheet with a "base score." I believe that all teams this year earned, yes earned, the right to attend Worlds under the current rules. I do understand people's frustrations with the bids process. Nearing the end of the season, it is possible for a 8th, 9th, 10th place team to earn a "handed down" bid. A base score would solve that problem.
2. One of the above posters offered the idea of limiting bid opportunities to Dallas, California and Atlanta. If an excellent team attends one of those 3 and happens to have an off weekend...no bid, no Worlds. (It happens. Even to the best teams.) The only way to secure a bid would be to add a competition. I live in the Midwest. To add a competition to California or Dallas would be a HUGE additional expense. We are talking a thousand dollars or more. What about Jamfest in Indy? IMO That competition is a valid event to earn a bid. I think by limiting bid opportunities to a few events is going to the opposite extreme of the current system.