[sureglymop]

Intelligence is just the ability to think logically (at least as defined by iq). What you mean is probably overthinking, anxiety, etc.

[duttakapil]

Yes, and it seems to be that brains with higher intelligence have stronger tendencies to "overthink" and thus triggering anxiety, irrational discomfort, etc. Everyone experiences this in general, but with higher intelligence the likelihood dials up. See this paper - https://www.sciencedirect.com/science/article/pii/S016028961... for reference