I'm telling it to give the reader the feeling of what it's like to see a smart person fail at something basic because they fail to cross domains, but when writing I couldn't actually come up with a real example that was simple enough to fit in one paragraph.

I would suggest the example of someone not getting the evil bit joke.

It's good because it works both ways. You only need common sense to understand it, but lay people can be intimidated by the context into not applying common sense, and you'll sometimes see domain experts try to implement essentially the same thing because they turn off common sense while in their domain.