system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: most of modern, postmodern and contemporary art is a sham (in painting and sculpture)

I am specifically refering to abstract, abstract expressionism and many other disciplines like these two (in painting and sculpture). They show a lack of skill and ability from the artist!
What makes the type of paintings that De Kooning or Yves Klein made so popular and so worthy? Why is Pollock so adored by every art critic or even the public in general when all he makes IMO are just paint drips on a big canvas.
I get impressionism and to an extend cubism but I really do not get abstract expressionism and some of our contemporary art (like the banana taped to the wall, or just two clocks on the wall, or a policewoman taking a piss etc etc). 
For example in music: If I just start typing random keys on the piano, the music wouldn’t be called good, although I intended it as an expression of my inner self. Why isn’t it the same with painting? Or am I missing something here...
gpt
You are missing the visual appeal of how the piece of work feels to the viewer when they look at it. Think of it backwards. Go to a wallpaper store and look at all of the different patterns and designs. They range from simple plain and boring to crazy and bizarre. They may seem easy to make (and maybe they are) but the point is that they evoke a feeling that is liked or disliked in the viewer and the viewer assigns a value to it. IMO there is no line between abstract art and wallpaper so in essence the value is in peoples opinions of it. The only difference is the scarcity factor which drives up the price.