It doesn't look like the rule is from the event organizers. Most likely local government who want's the money from the event while keeping the turnover high so that people will come, spend their money, and fuck off as soon as possible.
Not only nobody "earns" that much money, nobody should have the right to command the amount of influence that kind of money provides.
We are literally talking about FIVE people fucking with the lives of the entire planet.
Even if you add the active politicians of every country on earth, it would be a minuscule number of people controlling the lives of eight billion of us, and the most frustrating part of it is that vast majority of that eight billion thinks this is normal, or even should be encouraged.
Good faith is the key here. I'm all for disagreements leading to lengthy discussions and even some controversy as long as everyone is arguing in good faith.
I can't stand trolling, outright bigotry, and the normalization of literal fascist opinions as a mere "disagreement". If a "disagreement" (you know which ones I mean) will lead to people dying if enabled, I'm pretty happy keeping those ideas out.
They want security for them and against everyone else.