No, Liam, you misread it. Brains was saying that John said most of the words were WRITTEN BY Allen Klein and Yoko. But as far as John saying that the song could have been about himself....HA! That's a bunch of blarney right there if you ask me!! How on earth could that song be about anybody but Paul? It's a BLATANT song about Paul.
The references to Pepper and Yesterday certainly suggest that! I reckon John was just confused!
So let me get this straight - it was written mainly by Klein and Ono, and neither of them got a writing credit? How so?
The difference between genius and insanity is merely the difference between success and failure.