The first few hours can determine if someone sticks with something or not. Emacs might best benefit the power user, but normal users need simple products too.
I'm not sure how ability to learn Emacs and ability to construct a good knowledge base are more than weakly correlated.
I know dozens of people who use Emacs and dozens of people who have well-organized knowledge bases and while a few people have both that's about what I might expect based on random chance.
Some people might want to help their grandmother organize themselves better as they age, why do they need to learn a DSL and ecosystem instead of just downloading an intuitive app with modern UX sensibilities?
