Ian McCulloch undersells

Ian Mac is busily writing his autobiography. Well, we say "writing"; he's signing a deal and talking it up, anyway:

"When I had all my initial interviews with publishers Faber + Faber, Transworld and Penguin, I told them this is going to be the best book ever, better than the Bible and not as high-falootin' and with less apostrophes. "(But) by the last meeting, they were still asking me what it was all about. I said I didn't know yet."

We know rock stars are somewhat prone to excess, but how far gone would you have to be to not know what the story of your life is going to be about?