Burning Man, like the internet, peaked in the 90’s.
These things only work if they're special, such that only like-minded people know about them and can attend. It's the Summer Of Love Problem: Once everyone's calling it that, the idiots, losers, and assholes move in, and nobody can experience what it once was. It's why MIT and Harvard will never be "inclusive" in any real way, just differently exclusive along other arbitrary contours.