People are selectively smart / stupid on a regular basis. It’s called “compartmentalization”.
Still, my guess is that you’re the one with the inferiority complex when it comes to “smarts”. People are generally very good at gaslighting you about how dumb you are, so I suggest you come up with a different standard for what is smart or not, rather than looking to the herd for guidance.
If only there were a system of investigation and discovery with a proven track record of success in understanding the real world … hm …