It's actually incredibly common in audio controls to give people a "volume knob" that barely has any range at all. I've seen similar tiny-range controls on com

It's actually incredibly common in audio controls to give people a "volume knob" that barely has any range at all. I've seen similar tiny-range controls on commercial thermostats. Even if the system is perfectly calibrated and automatically adjusts levels on its own, people want to feel like they are in control. As for elevators, I have encountered exactly one building where the door close button works even in the default mode (not independent service).