I came here to make the same points that you made so eloquently. The only thing I’ll add is that I wonder if there is some correlation between the traits that make someone so good at solving “well defined” problems and mental illnesses. You can’t be “happy” if you’re paranoid (as one of the OP examples- a 9/11 conspiracy where his own theory- Cognitive Theoretical Model of the Universe, or CTMU- is under attack.