You see, that's the problem that you find it difficult to even comprehend that some people are like this. I often find myself thinking I'm clueless about computers just to slap myself in the face seconds later, as a reminder that the absolute majority on this planet is nowhere near my level. Even in professional environments, people struggle to do so many things tech related but unless you are one of them, you just assume everyone knows it. In some fields it's the opposite, where people tend to be arrogant because they think they know stuff everyone else has no clue about. Every time I meet a doctor and I throw in some phrases rarely used outside medical field, they immediately ask if I'm a doctor, because suddenly I stand somewhat higher in their eyes.
