When you write and record something like Quadrophenia at age 19 you can afford to be pretty self confident. When I say ‘record’ I mean Townshend played and recorded all the instruments and vocals before the other band members ever heard it. As he did with many albums.
He didn’t do Quadrophenia (1973) til he was 27-28.
Pete was born in 1945. He was 19 in 1964 when he wrote “My Generation”.