it is bad if they don't realize how simple it is to pump their own gas. That's about the equivalent of a possibly regular task like being able to unencrypt your own files. I'd say it's important enough that you should not be relying on anyone with the potential security of your own personal data.

The relevant aphorism is "make it as simple as possible, but not simpler". You can add functionality to make things easier, same as syntactic sugar in programming languages. You shouldn't turn the person using your system into an object, just accepting what it gives them in response to their magic movements or clicking pictures.