I never understood how anyone could write more than 40 pages of “self help”. Especially not for a general audience. All self help boils down to the very foundation of your worldview, all other advice stems from it.
The whole spiel about "I just want to help others in the same situation" died with the Internet, because for the past 30 years it has been entirely feasible to publish your advice and guidance for for free. The books are just for money and fame.