Thomas Shey
Legend
Confidence in one's own brightness is generally fine, imo. It's genuinely empowering. The problem really begins, imo, when that self-assuredness in one's own smarts comes at the expense of qualities like humaneness, empathy, and respect for community. I think that's what got our civilization so drenched in privileged techbros.
It also doesn't hurt to learn that your intelligence and aptitude in some areas doesn't automatically port over to other areas. There are a few well known examples of people who were genuinely bright, even brilliant in some areas who showed amazing stupidity outside of it.
General intelligence is, as a poster up-page said, a very useful tool but it can also lead you with a great degree of overconfidence about your ability to engage with every thing you come across, when it can require at least some additional talents to do so properly. The vagaries of my professional life taught me that the hard way.