I guess it's all part of the right brain , left brain quandry. We are trying to quantify the unquantifiable. The human being's need to put everything in a slot so he feels safe and comfortable.
Art is at it's best is probably uncomfortable, because it makes us think or react or at least evokes some sort of response.
The next question, is art that makes us feel comfortable, as good a piece of art as that which disturbs us.
I certainly don't have the answer.