@Keet
A rewrite of the setup could generate a lot of new readers because the cruelty is not really necessary for the rest of the story. With a little creativity the healer can be introduced anyway, even with it's initial misunderstanding of the human physiology.
I've said the same thing many a time, but alas. Rewriting is never as fun as adding more, and some authors aren't interested in it at all. At least telling people that it's a sci-fi / action-adventure story gives them an idea of how long they have to hold out. Also, the first few chapters really are the worst, even there.
The 'books' in Arlene and Jeff have never made sense to me, and I say that as someone who will happily say that my own book endings are arbitrary. They make sense to me, and I prefer them to other options (and can discuss why), but they're arbitrary. I just can't really figure out why Book 1 or Book 2 of A&J end where they do. Thus, Book 3 is the 'best', because it seems to have little chance of arbitrarily ending and starting another book.
Side note: A&J is hardly the only story with that issue. Cainneach McEinri's 'Sarah's Saga' stories start out with 'Mistaken Identity', which is oh so very, very, VERY much more cruel and dark than anything in A&J, yet morphs into a fairly satisfying, quite enjoyable science fiction story. I hate to think of how many readers run screaming, though (or drop the story because they can't bear to slog through it to get to the good parts).
Anyone who has read the novel 'The Princess Bride' will be well aware of the idea of 'the good parts version'. A&J could use one of those.