"And Rock n Roll existed before the Beatles.
"
And it continues to exist long after the Beatles are gone. Yes, there was rock before the Beatles. I remember the very beginnings of rock. The Beatles just carried on the already hugely successful tradition.
Yep, They took an already established medium and popularized it beyond anything imaginable.
They set a new standard and benchmark. And rock n roll has never been the same. Same with Hefner.