A lot of the folks who made up those great bands from the 70s and 80s, decided to pursue being rock stars because of The Beatles. How many bands essentially were launched the night The Beatles played on The Ed Sullivan Show?
The Beatles sucked.
I never liked them.
A lot of people were already listening to the bands that influenced The Beatles (et al...) The Beatles stepped onto the Big Picture via Ed Sullivan in the US. Contracts and merch started flowing immediately.
The biz would sign to cow turd to get in on the action.
Read some Frank Zappa, he details the whole mess.