You may not like what he said, but in a nutshell he is right...and if you will notice the OP didnt disagree when called on it..
The OP is/has given some good info, there is no argument on that. But it's only a teaser so you will be more inclined to purchase his book once it comes out..
It's free to POTN users: https://theartofphotography.leadpages.net/breakthrough-launch/
Notice that nowhere in the original post does it mention a book? Chill on the trolling.