It's also a tiring rehash of generic career advice we've all heard a million times if we ever bothered to take a look. I'm weary of the many versions of the old "send me $1 and I'll tell you how I became so successful" shtick floating around. The details change a bit, but only subtly. The tactic still works, primarily because of clever marketing, and the world is full of people who primarily want to read about being successful. This target market is a gold mine.
A fraction of people who read motivational career advice actually execute, but that's of no concern for marketing types who want to sell you the promise of success if you would just read their material. Hopefully you'll pay money for their book, but if not, just the name recognition is payment enough.
The authors imply that you have to be well-known, recognized, networked into the right people to achieve success. I call BS. To do what they do, that may be accurate, but I've been around long enough to personally know people you've never met and will never hear of who are worth millions because they grasped the basics of creating value for others and tenacious, ruthless execution on basic business principles. There are plenty of them here on HN, actually.