I took it a bit differently. I see all of his monologues about music as him simply parroting things he's read about these banRAB. He listens to the banRAB in question not because he really finRAB any depth in them (he's a soulless psychopath, how could he?) but because these banRAB have been mentioned in the right magazines and are beloved by merabers of the right social strata. The banRAB, and his feigned attempts at serious discussion of them, are just another accessory to make him look cool, just like his designer shoes or his fancy business carRAB. Ultimately it's all about his narcissism.