Jonathan Haidt speaks about something similar in The Happiness Hypothesis . Epiphanies can only take you so far, before their novelty wears off and they lose the power to change your behaviour. This is why self-help book readers tend to keep reading self-help books. 4 weeks after finishing one they need another hit of epiphanies. Even the lamest examples listed in the OP article can probably give someone a boost in p…
Funny, I've experienced the same thing with philosophy.
In my teens, I've had this existential crisis where the world just didn't make sense to me. Eventually I have discovered philosophy and started reading it, and for a while the world made sense to me. However, every epiphany I've had about the world only kept my enthusiasm up for a while - after some time I'd still know all the things I learned, but they just wouldn't seem as important as before.
The world made sense... But I just didn't like the way it made sense. That's when I realized that the problem is me, not the world, and that the problem cannot be solved by pure knowledge - there is an animal inside me which doesn't give a rat's ass about all my theories of why and how, and requires a different approach.