"I'm not smart enough" is, I think, 50% "I'm too intimidated by what I don't know" and 50% "I don't care enough to overcome the initial learning curve."
Precisely. I wish education was focused on overcoming these two things.
Also, anybody thinks that being smart is mostly the result of removing complexity from your brain ? There's nothing 'more' for you to do or have, but to let the idea sink and reorganize your mind with a simpler thus larger concept.
Or are we so politically correct now we can't acknowledge variation in mental capacity - particularly working with numbers and logic.
I think it's maybe 10% intimidated, 10% lack of motivation, 80% not smart enough.