SpaceX recently released a browser game where you use the real flight UI to dock with the ISS: https://iss-sim.spacex.com/
When what is happening is basically an artificial computer process with human overrides, It could be a little disingenous to have a physical switch.
For instance: imagine there's some pump that the computer won't let you disable because disabling it would cause an explosion. You are in an emergency and flip a switch intending to disable it. You now don't know the internal state of the process... whether the switch flip did what you intended or not.