Yeah, I'm not sure what the difference is between the people who come away from the experienced more "enlightened" vs just more insane.
It kind of feels like an all-or-nothing thing: once you start to "see through the illusion of self", you have to follow that through to its logical conclusion or you'll be stuck living with intense cognitive dissonance.
I don't generally like to talk about this stuff too much because it sounds absolutely nuts to people who haven't experienced it.