I prefer to listen to what they have to say, especially if it means that I have a chance to make my future writing better in some way. (And I already have one concrete issue that I've remembered and passed on to the people that I've been working on my book with, so it's a net win for me.)
Also, I don't think I can really make use of the latter part; it implies that only people who have taught the subject for years are qualified for writing technical books, which - given that I am not a teacher and likely won't be one - gives the resulting vibe of "just give up" without any possible improvements. I can't make any use of that in order to improve my current or future writing.
I get your point on not being a teacher, but I would recommend doing it as blog posts then and not a book, a book implies something much more. Or maybe I’m just old school and not for the current times. After all, there are countless of ebooks of questionable quality on various programming topics.
I'm curious about "a book implies something much more" though. I have seen multiple series of blog posts that then grew to the point where they were actually published as books. What's the difference between the two when one wants to tell them apart via their content? What's this implication that you mention?
For example, books (at least used to) have editors, and reviews by multiple specialists in the field. I can’t think of distinct step between personal writing and something publishing, so I cannot add meaningful comments to your question.
Thanks for the feedback; I'll let my reviewers/editors know, get this fixed in the second edition, avoid doing that in my future writing.