Dancing in large groups with other humans truly is primal, and something special. It's akin to the experience I think people get when going to church and similar things, weirdly enough.
Everything is so artificial online today as well, that maybe it's the contrast between what we see all day vs when we're at events, that make it all seem extra special nowadays.
Before I went to my first Phish show I always heard people refer to it as their church; it didn't make sense to me until I went. Even being sober, it was a very powerful experience, and the sense of connection and community was very enlightening.
Going to church, you say? :D
https://www.youtube.com/watch?v=1ltoAcZrjBw
(Faithless : 'God Is A DJ', Live at Alexandra Palace)