And smart people suffer [0] [1] [2] [3] [4] exactly because they, first, think that others can have the same scrutiny about things and get surprised/disappointed when they find out how other people reach conclusions. Loneliness is the most common.
[0] https://doi.org/10.1111/j.0963-7214.2005.00328.x
[1] https://doi.org/10.1111/bjop.12181
[2] https://doi.org/10.1016/j.intell.2020.101465
[3] https://studenttheses.uu.nl/handle/20.500.12932/28009
[4] https://link.springer.com/article/10.1007/s43076-023-00313-8
The more I look into philosophy the more it seems the "enlightened" thing to do is instead pity the people we perceive as stupid because (unless they have a clinical pathology) they are simply misinformed and unaware of that fact (plus the dangers of such confidence).
This also makes it harder and harder to hold grudges against people in general, which I'm on the fence about, because I've had people close to me do some really horrible shit in my time.
I'm not religious, but there is a bible passage that I feel just happens to sum this up nicely:
For with much wisdom comes much sorrow; the more knowledge, the more grief. - Ecclesiastes 1:18