You are spot on.

Rock is all about bucking the establishment, it's about counter-culture (norm culture), it's about freedom in the truest sense of the word.

But it's been taken over by marketing, corporate and special interest. Pop music has been this way for awhile (look at Britney and ridiculous contracts).

A lot of the rock counter culture stuff was born out of Britain, the epitome of governmental-monarch-led-neo-feudal oppression. the system was so shit that the youth (of the day) didn't know what to do with themselves, so they lash out with music -- may not be the most poetic or righteous, but it is what it is. A symptom of a much deeper root disease.