When you walk into a room where someone is playing you're agreeing to something. Not consciously, but really. You're agreeing to be taken somewhere. To follow. To let someone else make decisions about where the energy goes and trust that they have a destination in mind even if you can't see it yet.
That's an unusual relationship. In almost every other context we resist that kind of surrender. We want control, optionality, the ability to skip. Music technology has spent twenty years building tools that give us exactly that; infinite libraries, personalized queues, skip buttons. All of it optimized for individual preference satisfaction.
And none of it produces what a good DJ in a good room produces. Because the surrender is the point. The trust is the mechanism. You can't engineer collective effervescence while also giving everyone an exit.