A recent study has uncovered a striking connection between cognitive ability and the tendency to have unrealistic financial expectations. The findings, published in Personality and Social Psychology Bulletin, provide evidence that individuals with higher cognitive abilities tend to have more realistic, or even pessimistic, views about their financial future.
I can see the logic in this:
if you believe everything is good then there’s nothing you need to do,
whereas if you see the world as it is or with a pessimistic perspective then you’re probably more likely to seek out knowledge to better prepare for yourself