I have a suspicion that art is to humans as fancy tails are to peacocks: the difficulty is the point.
I believe this is why we have art galleries proudly displaying oil paintings of fruit bowls, but don't do this for random food snapshots.
It's also why photographs as a category were initially dismissed (in an era that had come to praise extreme realism in paintings), but when photographers went on long trips to visit unusual places, people, and events, those photographs suddenly did count as art.
Bit of overlap between arts and knowledge shown by the wiktionary entry for the Latin "ars", so this can be extended to the way Socrates didn't like writing, and the desire for hand-made foods and durable goods over mass produced foods and products.
