I notice that almost all of those books are about things that are considered "mental problems" (the exceptions being chronic fatigue, chronic pain, and relationship problems, which are nevertheless specific problems). So if a self-help book isn't about a particular problem (like How to Win Friends and Influence People and The Seven Habits), or the problem it talks about isn't primarily psychological (like Getting Things Done), then it won't appear on that list regardless of how good it is.

(Stating my opinions here so that you won't have to guess: My brother, who seems quite sensible and whom I admire very much, states that all three of the books mentioned here are very good. Getting Things Done taught me one extremely useful lesson, probably among the top five most useful things I have ever learned. I have little evidence, apart from this stuff, that any of these books are useful.)