I from henceforth theorize that art was once purely full of meaning and deep thought, then some idiot who couldn't think to such depth came along and thought art was all about making a painting that is as nonsensical as you can make it. And that's how art was ruined.
Of course, the same won't happen to philosophy because that is pure thought. You don't express it through art, you express it through words. And since fools can't think, and philosophy is all about thinking, then they won't be able to ruin it.