This is hitting on something else which might not really be relevant here though. But maybe I can draw it into this so I'm going to try. It's a simple idea: I agree mostly with the notion that people can push past certain self-imposed limits based around intelligence and capability and we all have our traps and our delusions which we've cobbled into these working personalities in order to deal with existing. However I do think there are individual limits which can be hit based on the (assumed real so fuck you Descartes) hardware we have biologically in the form of our brains.
In other words: for some people it really IS over their heads. Otherwise we're just encouraging magical thinking. But then again I love playing all my sides at once if I can remember them, so I can buy that for the average (one day we'll find that right? An average?) person possibly could attempt to put time and effort into researching and studying complex and intricate scientific theories and ideas, but if their equipment isn't quite up to scratch then the amount of time and effort possibly looks negligible for any pay off.
Plus that whole notion of knowledge itself being the reward and there being no end to it. People understand things on different streams and complexities and some are playing with better memory than most of everybody else and some are playing with worse memory.
I think the reason theories like MBTI pop up is because the fast memory tricks a person into thinking they jumped from A to Z and ignored the other 24 letters along the way when really they did it so quickly the other letters were irrelevant. But then you have to pretend that getting distracted by different information, say a number popping up between I & P, is not also part of that process.
I don't know really, but from my basic ( and I mean basic) observations; people get what they're given and then do what they can with it and the only sensible option is to existentially introspect endlessly on what choice is the choice when you made the choice until your hardware ends up at Cambridge in a jar of vinegar.
But that's not fun, so we invent boredom to block out the parts that might be a little bit too much for us...in other words the parts that are "over our heads".