Americans seems to have an obsession of writing manuals. No offense to Americans. Maybe the book market in China is to blame. It has noticed how quick the adaptation is of such style of book to the Chinese market. It may think that it has found an easy way to a renaissance of the publishing industry. So it has been a tendency to introduce more and more manual books to China, teaching people how to do this and how to do that. Maybe not exclusively China, the whole world is penetrated with this desperate desire of quick learning, and the publishers have just connived it on their part.
The suggestion of the auther is plausible, but he has just wasted so many papers trying to tell us a few of suggestions which could otherwise be narrowed down to a few of sentences and those advices could be more clearly understood in that way.
Sorry to give such a negative comment, but indeed, the parable that the auther offers us is full of plaintiff and persuasion.