Sting was a school teacher. Jagger studied economics. Gene simmons taught public school as well. Rod Stewart was well on his way to becoming a pro soccer player until a knee injury ended his career. Paul McCartney always played music.
But, what if they hadn't made it? What if George Martin received --in what he, himself, said was "The final option"- - yet another in a long string of rejections from EMI? Would The Beatles have broken up?