I'll let Frank Zappa speak for me:
The most important thing in art is The Frame. For painting: literally; for other arts: figuratively -- because, without this humble appliance, you can't know where THE ART stops and THE REAL WORLD begins.
You have to put a 'box' around it because otherwise, what is that shit on the wall?
If John Cage, for instance, says "I'm putting a contact microphone on my throat, and I'm going to drink carrot juice, and that's my composition," then his gurgling qualifies as his composition because he put a frame around it and said so. "Take it or leave it, I now will this to be music." After that it's a matter of taste. Without the frame-as-announced, it's a guy swallowing carrot juice.
Most people can't deal with that abstraction -- or don't want to. They say: "Gimme the TUNE. Do I like this TUNE? Does it sound like ANOTHER TUNE THAT I LIKE? The more FAMILIAR it is, the BETTER I LIKE IT. Hear those three notes there? Those are the three notes I can sing along with. I like those notes very, very much. Give me a beat. Not a fancy one. It has to go boom-bap, boom-boom-BAP. If it doesn't, I will hate it very, very much. Also, I want it right away -- and then write me some more songs like that -- over and over and over again because I'm REALLY into MUSIC."