All good and well, you compare the somewhat well thought out and excellent life advice of a learned man, to some kind of alternative delivery of an all-encompassing truth about life that you expected from the individual.
Someone like myself would say your expectation is completely misplaced, nobody in the world offers what you describe these people should instead be offering, and those that do, are charlatans.
Rather than directing lost individuals toward an all encompassing doctrine that could help set them on their life path, he instead sells them a book, and another book.
There is no such thing as an all encompassing doctrine that helps set people on their life path, all alternative doctrines known to man don't encompass all, and do not live up to the general standards you set, as well as imply, in your article.
All in all your language was good, I enjoyed reading your opinion, even while strongly disagreeing with the implied meaning, and personally experienced a 'wall of bias' effect on the underlying communicated message, I still enjoyed the read and found it articulate at the expense of being a little verbose.
Keep up the good work!