He wants to say: First of all, you were wrong about pop music. And art and all of pop culture. And all kinds of things. Because all of it matters. Even if it is awful. Everybody knows all the bad movies and the bad songs on the radio. Because it's the only thing anybody has in common anymore. It's all anybody has. So you were wrong about that and you were wrong about us and you were wrong about me, but he doesn't actually say any of this out loud.