Football had marching bands, where the only physical danger present was if you got a seat in front of the trombone section. But, somewhere along the line, sports teams lost faith in their fans. First, they decided fans were too stupid to figure out for themselves what was going on. Telling the fans what to do wasn't good enough, though. Everybody knows how exciting it is when fans make a lot of noise.
Fans are funny, though.
They don't make much noise if the product's not any good. Winning takes time, sometimes generations. Officials figure it appeals to young people, too. Maybe it does, as long as they don't want to discuss it with the people around them. Tech fans decided they had heard enough, though.