OP was nice enough to answer a pretty intimate question.

    You’re just insular

We don't know this person personally, so it would be wrong to make assumptions about their communication.

    you’re not really any smarter

You are using their innocuous comment, to project your insecurity onto OP. Well done on proving their point. Yeah, some people are better at tasks that are traditionally considered to signify intelligence. The kind who go to study difficult majors at university at 13, are very very likely to be smarter within that definition than the majority of the people they run into. It is fine to accept that. It is not like OP is going around taping 'stupid signs' on people's foreheads.