I don't think art should or has to be anything.
It's nice when it's beautiful, thought-provoking, deep, insightful, etc., but I don't mind having to sift through rubble to find these gems.
Plus, I feel like there's beauty in any work of art, simply because it's a tangible expression of what's going on in someone's mind. It allows them to express what can't be summed up with words. Even when it's a commissioned work of art, the artist still leaves their personal touch, and a little bit of themselves, in the work. Thoughts, fears, hopes, dreams, feelings, stances on an issue, a tool to enact change - all residing within color splashed upon a piece of paper, clay, once shapeless, molded into a breathtaking display, and all the other media - that's a beautiful thing.