I mean that’s good lateral thinking but the issue is not that one particular button will go out but that any button or buttons could, and at any time, and it would probably be the most-used buttons since it was wear-based failure.

They also briefly showed a single button on the wall that it was implied functioned like an elevator button.

There were a lot of ways it looked like things could trivially go wrong, once you got a feel for how it was built.