A grumpy, old rocker rails against what those young whippersnappers are listening to. Meet the new boss, same as the old boss, etc.
You’ve got that exactly right. People like this - as well as the “suits” in the music business - are almost all reflexively liberal and hate anything that deviates from that worldview. Of course, they’ve been shown to be completely wrong about what the “market” wants time and time again. They’re basically “followers” in every sense - artistically, politically, personally.