It assumes that what is popularly believed must define the reality of any situation. The Beatles will be a footnote in 50 years and forgotten totally in 100. Don Van Vliet, Sky Saxon and Brian WIlson will still be honored. Many rock writers saw punk as being progressive at the time. You said, punk rock was invented to sell clothes.
Rock music is folk culture.
SO the question needs to be re-arranged. I am a native American. We have a native culture. Maybe you don't want to give us one. Maybe you want our native American culture to be confined to granny sitting in a rocking chair in the Appalachian mountains or field Negroes singing spirituals as they pick cotton.