Non-programmers know that they're not supposed to understand programming. People who've taken a reasonable number of math classes tend to feel like they should know more than a tiny fraction of the math that's out there, even if this expectation is unreasonable.

I know I found it pretty depressing the first time I realized that after taking fourteen or so years of math classes I'd never really made it past Advanced Arithmetic.

That would be symmetric, but no, it's not the case. Most of the SO questions are of a more naive character. ("I got this error message, what do I do?")