How useful is Richard A. Peterson's Production of culture perspective of Rock and Roll?

Richard A. Peterson suggested six factors for the emergence of Rock and Roll. These are law, technology, industry structure, organisation structure, occupational career and market. Peterson believed that the emergence of a group of creative artists, i.e. Elvis Presley and Chuck Berry in the 1950s was responsible for the birth of Rock and Roll. Additionally, the baby boom after World War 2 created a teenage audience that demanded new types of music. However the baby boom cannot account for the explosion of teenage demand, as baby boom children would only have been 9. This perspective of Rock and Roll allows us, the audience, to see the development of Rock and Roll. Furthermore, Rock and Roll music most commonly includes three chords, thus meaning that young children could learn how to play these songs on the guitar, and in doing so appealing to a new audience. However, Peterson never actually addresses music, there is no focus on how it is made or how it sounded. Therefore his theory is not very reliable, as it never includes analysis of actual Rock and Roll music.