Art is all about 'transgression' and 'confrontation' now. It hasn't been about aesthetics for a long, long time. The fact that being gobby and sophomoric provocative is simply easier than being 1) technically accomplished and 2) having a keen eye for beauty probably has correspondences with the rise of flab acceptance. Real art -- for example, hewing a idealised human form from a block of marble -- is hard; collaging rubbish, or photographing fat people (but I repeat myself), is an easy pass.