Yes absolutely, I find even the best non fiction books tend to be about 10% core ideas and insights and 90% allegory and metaphor reinforcing those ideas. Bad non fiction is more of a 1/99 split aha.
It's interesting you say that, I actually recently wrote a blog post title "Don't help your kids with their homework" https://www.chrisbehan.ca/posts/dont-help-your-kids-with-the... although for very different reason than you have highlighted here. Thanks for sharing your perspective (:
"an essential ingredient of learning is feedback, often received in the form of grades"
"Recommend resources for learning"
The best thing someone can do to help another learner is to teach them how to evaluate their own work. If there is an answer key to the book, that's great. If there isn't, then they should learn how to use the worked examples to evaluate their learning.
Feedback is important as you say, but having a long time delay between completing something and the evaluation through a grade isn't helpful. It can be demotivating, lead to reinforcing or practicing bad habits, or not making the connection between seeing continuous improvement.
