I’d take issue with some of your last point. Absolutely no one should ‘blame themselves’ for having enjoyed and believed TSP, of course not. You’re in good company, quite apart from anything else! SW’s agent and editor made a good call in taking the book on, for the excellent reason that they thought it was widely appealing and would sell. (Obviously every time an editor buys a book, they think this, and sometimes they’re not right. This time they were.)
I enjoyed it myself, having read it years ago, though I felt ‘Hmm’ enough about the court case at the time to google various combinations of ‘Raynor Winn’ and various courts, legal processes etc and was even more ‘Hmm’ when there was literally nothing to show they’d ever existed before the publication of TSP. (Then I promptly forgot about it.)
My points about some of the responses to the CH story being naive, I think, do stand, though. I think that more au fait readers are aware that a publisher is not guaranteeing the truth of a memoir, that embellishment and rearrangement of timelines are commonly done for dramatic effect, that there is no army of eager beavers behind the scenes checking table quiz questions and the sex of the cafe owner in a particular cove, that legal reads are primarily to avoid publishers being sued by either people misrepresented in the book, or for teaders taking it as legit medical advice, and not to ask ‘Did this really happen?’
I absolutely guarantee that a frank conversation about the writing and editorial process with other successful ‘nature redemption memoir’ authors like Amy Liptrott and Helen Macdonald would involve significant shifts in timeline, emphasis, location, the invention or deletion of characters, the removal or insertion of subplots. That’s not just SW being dishonest. That’s memoir.
Does that make embezzlement ok? Obviously not.