Agree 100%.
I submitted this post but arrived at the same conclusion with this book recommendation, also the author is way too young to have ample experience...
It’s like the process of a journalist writing a book on a topic they have only the vaguest idea about, there’s a lot of reading and at some stage hopefully some understanding slips in. Except Josh has a business degree and worked at Procter & Gamble so he actually knew what he was on about before he started writing.