When I see other people making a big deal out of seemingly-minor problems, I’m in this weird superposition between thinking I’ve avoided them so easily I missed their existence, or fallen into them so thoroughly I’m like the fish who can’t see water.
And when I see other people struggling to understand seemingly-obvious concepts, I’m in this weird superposition between thinking I’m so far beyond them that I did it effortlessly, or so far beneath them that I haven’t even realized there’s a problem.
There are concepts nobody gets on the first reading, concepts you have to have explained to you again and again until finally one of the explanations clicks and you can reconstruct it out of loose pieces in your own head.
And there are concept-shaped holes you don’t notice that you have. You can talk to an anosmic person about smell for years on end, and they’re still not going to realize they’ve got a big hole where that concept should be. You can give high-school me an entire class about atomization, and he can ace the relevant test, and he’s still not going to know what atomization is.
Put these together, and you have cause for concern. If you learn about something, and it seems trivial and boring, but lots of other people think it’s interesting and important – well, it could be so far beneath you that you’d internalized all its lessons already. Or it could be so far beyond you that you’re not even thinking on the same level as the people who talk about it.