> i ought to be allowed to produce a clay-tablet version (at my own expense, and only for my own use).

What in the world does this have to do with Amazon providing a feature on their audiobook distribution platform, for which certain licenses were acquired to be able to distribute these audiobooks, that automatically creates unlicensed copies? If you want to create a clay-tablet version from your own copy for your own use, go for it. But the moment Amazon decides they're bored with audiobooks and start selling clay-tablet versions on amazon.com without appropriate licensing, that's entirely different.