When we analyze art, we look for deeper meaning in it. A critic is

First of all, when we analyze art, when we look for deeper meaning in it, we are enjoying it for what it is. Because that is one of the things about art, be it highbrow, lowbrow, mainstream, or avant-garde: Some sort of thought went into its making — even if the thought was, “I’m going to do this as thoughtlessly as possible”! — and as a result, some sort of thought can be gotten from its reception. That is why, among other things, artists (including, for instance, James Cameron) really like to talk about their work.