Before reading the book proper, I had heard some excerpts of the audiobook and I think that the portions that got attention prove Harry's point about the tabloids and public scrutiny. He talks a lot about the heir/spare dynamic and how he was set up to be the clown of the family. Even when he tried to do something of substance, his past mistakes would be brought up to discredit him and make him a joke. So part of revealing the embarrassing, fascinating stories is to signal to the British press that they cannot blackmail him since he divulged them on his terms.