How useful is a production of culture perspective in understanding the birth of rock and roll?

Richard A. Peterson stated that six factors were responsible for the birth of Rock & Roll in 1955. Law, Technology, Industry Structure, Organisational Structure, Occupational Career and Market. Peterson also claims that the demand of stars at the time like Elvis and Chuck Berry played no part in the birth of Rock & Roll and nor did the demand from the post war boomers.

I dont think that a production of cultural perspective is that useful in understanding about the birth of Rock & Roll. Peterson has simply set up a framework that could be applied to any genre of music, he does not suggest why this framework gave birth to Rock & Roll in particular and WHY it was Rock & Roll. Nor has he given any evidence that it was 1955 when it was born, considering there were singles released even fifteen years before this date that could be classed in the genre (The Andrews Sisters 'Boogie Woogie Bugle Boy' -1940). If he believes that the supply of stars at the time played no part, then surely without these stars like Elvis and Chuck Berry Rock & Roll may not of even been seen as what it is today.