how useful is a production of culture perspective in understanding the birth of rock roll

The strengths of production is Petersons 6 factors especially law which tells us how ASCAP’s lack of respect for music led radio stations to play more Rock n Roll and since technology was advancing from the popularity of TV to the structure of the vinyl the available distribution outlets for the birth of Rock n Roll was more than enough. But it fails to explain why it was rock and roll that bloomed and not soul or blues or jazz music. The theory is solely concentrating on the how it came about but it doesn’t address why it was rock and roll. The theory is inaccurate also because if we look at the baby boom that caused the rise, WW2 ended in 1945 and Rock roll 1955 so their children would have been 9/10 which is not a teenager so we can’t assume it was down to the baby boom.