You are relatively new here, AK. So you haven't had a chance to follow thread after thread over a long period of time. All I can tell you is that people are different and relationships are different. There is not one kind of WAW who responds a certain way to stimulus A. If you get caught up believing that a theory is going to save your marriage, you can end up missing the boat.
Coach saved his marriage, true. And he and Greek get along great. I know that. But that doesn't make his particular method foolproof. It worked for him. And he gives good advice. But you've still got to play the hand yourer dealt with the spouse that you are married to. As far as I can see, John is making tremendous headway with his wife doing things his way. What works for him may not work for you, and vice versa.