The beauty salon I go to has two doors at the exit. One of them has a sign: ‘do not use this door’. It will not open. Why even have the door?
It’s like the lever from the Emperor’s New Groove. You know, Yzma and Kronk are going to her lair and she steps up to the entrance and instructs Kronk, “Pull the lever!” He does so, only there are two levers and he has chosen the one that dumps them into the Crocodile pit. As they fall Yzma shouts, “Wrong lever!!” Then as they climb back up to use the correct lever she mutters, “Why do we even HAVE that lever?”