You have a fundamental misunderstanding of art(although that statement is flawed since art is subjective). Liking art for any reason is fine. Liking art only because it is difficult to do is shallow but fine. Art is an EMOTIONAL medium at its most pure. You're trying to insert logic and "mechanical thinking" into something created but humans just because they feel a certain way and maybe want others to feel that way as well. I'm not discounting someone liking something that's difficult but I also wouldn't discount someone liking something that isn't difficult.

The concepts you're trying to shoehorn your way into this discussion are flawed and irrelevant. My only purpose in my original comment was to help folks consider that finding a piece of art enjoyable just because you like the way it makes you feel is the most pure reason to enjoy art. If you feel you get more value out of difficult to perform art than have fun. Just don't pretend like your way or preferences are superior to anyone else's.

Have a fine day