Rob is blowing a whistle, over and over.
Bob: “Why are you blowing that whistle, Rob?”
Rob: “To keep the dragons away.”
Bob: “I see no dragons.”
Rob: “It works!”
Rob is blowing a whistle, over and over.
Bob: “Why are you blowing that whistle, Rob?”
Rob: “To keep the dragons away.”
Bob: “I see no dragons.”
Rob: “It works!”
I think you have the elevator example crossed. My random testing suggests the door open button always works. The close button sometimes is as you say, just to make people feel like they have a measure of control.
I think I’ve only seen one elevator that didn’t do anything immediately after pressing the close door button.