@KosherKrackers
I'm not sure how that definition undermines skill, talent, ability, or practice. Let's look at an analogous definition. "Food". If we're each making food, and we use the same ingredients, but I measure mine improperly and burn the crap out of my finished product, my finished product is still food. It's edible, it won't kill you, but it probably tastes terrible. If you, using years of practice and a flair for cooking, combine all of your ingredients in perfect proportions and heat it at the proper temperature for the proper time, you have also made food. But your food is better than mine. Similarly, a painting by Dali is going to be better than Human Centipede 2, but qualifying the latter as art doesn't ruin anything about the former. We have standards by which we can judge good and bad art, and while we can review and dispute those standards, at the end of the day we'll probably still want to have standards of some kind so that we can differentiate a Dali from a movie made by Tom Six in terms of which is better (which is not the same as which we like more).