My dear departed auntie had an Elvis on black-velvet painting that she just loved. We would wince every time we saw it, but for her....It was art and good art at that.
I admit that as someone who has played around with art more than a bit I find a great deal of material lauded as great contemporary art in such a state that I too wonder if the artist is just having us on.
I have seen perhaps a couple of abstract expressionist works that had a pleasing bit of color harmony and such...But that's about as far as I'd go. Minimalism? Worked for the pyramids. After that, not so much.
Slathering a canvas with red paint and using terms like "It's not about the image, it's about the paint".....
Doesn't work for me....
I don't tend to like avant-gard jazz either.... And minimalist music? Well....
But that's all taste. I'm sure there are folks who find some sort of intellectual stimulation from all these things and more besides. Millions of people like rap/hip-hop and "metal" music.....I'm not one.
It's probably presumptuous to refer to all the things I don't like as "not art" or "not music".....
However, I do recall the incident of the "prison artist" who used to show up on Johnny Carson. He had become quite successful. He had to store his canvases in a barn on the prison grounds, and the top one got totally covered with pigeon droppings. He was going to toss it....But he had a show coming up so he gave it a title and included it....Sold for 1000 bucks.