It's a good ability for Superman, since he's a worldwide hero.Though Superman & Lois did imply that Kryptonians on Earth have some advanced mental attributes. Superman tells Lois in the first season’s interview scene that he has learned all of Earth’s languages. And both he and Tal-Rho were able to marshal the mental discipline to communicate in the backwards English of the inverse world, something humans couldn’t do.
Of course, that only applies to the show’s specific continuity. But I liked the idea, and how subtly it was woven in.
But yeah, Lex is usually portrayed as a next-level genius. In the current comics lore, I believe he’s supposed to be literally the smartest human alive.