I haven't read the book, I'll just talk about the concept.
Sure a lot of verbal explanations are inexact, and it would be terribly cumbersome to play always talking to yourself, never just analyzing, but I think the point of verbal instruction is to plant seeds that later sprout as you play and analyze quietly.
Even so, some verbal explanations are the best way. For example a GM might say he moved a pawn because _____ square was critical or because it prepares for the endgame in _______ important way. If the point is a dozen moves deep you may never notice it, so it's great when someone points it out to you.
Then sure, in your games if you try to copy that idea you'll probably fail to apply it correctly a few times (as is common) but the seed eventually bears fruit so to speak.
There is this book you may have heard of it. Called Move First, Think Later by dutch master Willy Hendriks. In this book he says that most of the instructional material in chess is all bunk. One never thinks in this way. One thinks of concrete moves and only then later comes up with verbal explanations to back up their move. He says that the only way to improve your chess is to force feed yourself tons of chess theory and then when you are at the board you will remember something from what you learned.It made a lost of sense to me when I was reading it. Is anyone else aware of it and what are your opinions.