I think that every person have their own reasons, some just care for the drunkness and some just for the music, but I believe that it is a combination of all of the scenarios that makes a festival experience so great.
The mistake people often make at music festivals is that they only see their favorite artists perform. You only go to see the artists and bands you've heard before and the crowd always consists of the most devoted fans who know every word and when every pause is - in every song. Some may even know what the artist will say between songs.
So it is pretty obvious that you don't want to be next to some crazy fan who screams out the lines over excitedly when you're just standing there silently. With no idea of what's up next the fan will then look down at you and roll their eyes, to show that you don't belong there since you don't know the artist. Why is that? Why do some people have the desperate urge to show that "I belong here more than any of you"?
When I was at a concert once, a girl tried to push by me and when I held back she said "You don't even know the songs". Why does that matter? Some people also boast out loud about how many times they've seen the artist, and how long they've been waiting and so on, to show their loyalty and to show off to others.
It is also in my belief that it is way more fun to see an artist or a band when you know all the songs and all the words, but when people try to prove to others that they know everything about the artist, it is just ridiculous. If people could learn to only focus on the music and stopped giving mean looks and pushes, people could enjoy the shows more.
This summer I have promised myself to be brave, to go to an unknown gig and stand with the crazy fans and feel that I am also allowed to be there.