To me, this typifies working with technology and programming. Computer programs only ever look like they are working, because they have not encountered problem

To me, this typifies working with technology and programming. Computer programs only ever look like they are working, because they have not encountered problem data or conditions. Aka, it works on the happy path. Software engineering is how we balance how much of the unhappy path and corner cases we take care of, and how we handle them, imo.