There isnt its just a way to try and express a view a feeling an emotion or a way to look at things you should take art at its face value. Art can have real skill and craft some art is a pun or a meme its a scale as long as you remember its like anything else good music bad music. What makes Art different is that asthetics are not always required to transfer the message or meaning. The reason some Art sells for rediculous amounts of money is because of good old economics supply and demand make things more expensive than they need to be. Art it is what it is or what it is to you as Art generaly is a consideration of the self as the point of view. I see Art as an atemt to recreate the patern that fromed in the artists mind at the moment of experience. It's the biraze ability of humans being able to store information (experiences) outside of the brain. Or its just a pretty picture and there is nothing wrong with only seaing beauty in Art in fact id say anyone who does is lucky.
I like the idea of using art to store experience outside the brain. I think one of the best things about music, as opposed to visual art, is that people are much more likely to approach it at face value. There is still a lot of music that is regarded as bad, or talent-less (easy example: "rap is just talking over a beat"). But I find that people are willing to accept that listening music is worthwhile insofar it produces a reaction in yourself that you find desirable. This contrast may come from the fact that most of us, myself included, are more familiar with being "moved" by music than by visual art. Almost everyone understands the urge to dance.