What's the deal with DJ's

Ok, I'm sure I'll get some flack for this but I have to ask. What is it with these DJ concerts? I'm seeing more and more videos of huge shows where tens of thousands of people show up to here one guy literally pressing buttons! That's it, that's the whole show. They stand behind a bunch of... you can't even call them turn tables anymore, they're just buttons. And the crowds eat it up like they're watching something great. You mean to tell me that I can wave my hand in the air and play a bunch of mp3's I recorded at home in front of adoring fans and make millions!? What's your take on this, What performance artistry am I missing?