In a sense, nothing new is ever created. At least since the creation of the universe which we know little about, everything seems to just be energy switching states.. ^^
Art in my opinion is just us combining things around us in a consious way. That makes DJing a very nuanced art. There's a lot of consious decisions beeing done and that's why it's also very appeciated.
Examples to be more clear on my point of view. Highly subjective of coarse!
If a mountain is really beautiful it could be appreciated LIKE art because it looks as if it was created by consious decicions.
If something is created by our subconsiousness I guess that could be seen as similar to collective art as it's probably influenced just as much by others concious decitions as everything else we do conciously which makes all art collective art because we're all one peace love and unity 420