Yeah, that is the hard part. The best I have is that both ChatGPT and Midjourney are intended to be used creatively—the whole point is that you can give it the same input a dozen times and get a dozen totally different answers. If I could scan the same document a dozen times and get completely different text out, I’d say that’s a horrible OCR system.
And that’s where the harvesting of training data becomes such a problem, because if a font I created is used to train OCR, that doesn’t really have any impact on my ability to make fonts and get credit and royalties for them; if anything, it means my fonts are more useful because scanners can deal with them better. But if someone uses my books to train a system that’s meant to creatively generate new books in my style, well…