Going off topic. I looked up that book on Amazon and one critical review said it was the same thing repeated over and over and he could sum up the book's advice in one paragraph:

Make a decision as if you are betting all of your money on your choice. Don't take shortcuts based on your inborn biases and seek contrarian opinions and experienced counsel. Don't blame bad luck on bad outcomes; figure out how you could have made a better informed decision. Oh, and surprise, surprise, join groups with participants who have had similar experiences and expertise who can critique your choices and illuminate your blindspots. There you go.

Was he wrong?