Some other people has to grind harder and even be better than you to get half of your success, that doesn't mean that they are wrong, or that the book is wrong.
I believe a lot, if not all advice there in the book is necessary. Other people might not work at Google, but as I've said before, might need to grind different gears in order to be successful, if you don't -- good for you!
A lot of your suggestions would get you fired very quickly on many companies, it's good that it all works for you.