Here's one more book example, this time from Ishida-Davies 'Attack and Defense', a book that I appreciate very much.
There is a problem quite early in the book, asking which one is better for black, A or B:
Leela Zero thinks that the book right answer is 4.5% worse than book wrong answer, and a 7.5% mistake (also compared to the best local move). You can navigate the above diagram for some notes and variations.
I am not taking LZ opinion as gospel, by the way. Indeed, maybe alphago or the next year's LZ would have another verdict. However I have no reason to think that Ishida-Davies know better. LZ strength is evidence, and I think the only evidence, that suggests it may know better.
What I did learn is that no amateur has anything to worry if he has no idea which of the moves is better. The book would be a bit better if it just said that some options in this kind of running fight are A and B, instead of trying to judge them.
(One caveat is the komi, which was I think 5.5 when the book was written. But if the difference between A and B is so subtle that their ordering depends on the komi, then it is certainly high above the pay grade of the book's audience.)