I kind of figured it might be because he knows it's normal to have some kind of connection to music? Like he's got the clothes and consumer goods as a way to show off on material level, and then he can use the art he displays in his apartment and the music he seems to know a lot about to make himself seem cultured, but in a way that doesn't really take any reflection or real emotional connection on his part.

Or maybe he just does love commercial pop music and he goes on and on about it because it's the only thing he feels a connection to?