The US is cheap. We even famously have large gaps between the door/stall panels. I can only imagine it is to accommodate temperature/humidity changes so that they don’t jam.
Nicer places sometimes have actual deadbolt locks connected to a vacant/occupied indicator on the exterior. But it is rare. Usually it’s just a gapped stall with a sliding lock that will often not even line up correctly without wiggling the door.
In some instances I have had to use my gym key fob in place of the missing sliding mechanism to secure the door.
Edit to add: Bert literally stops the movie at one point to fourth-wall how hopeless everything looks. Ernie reassures him by asking what kind of movie would have a sad ending. Bert immediately replies Titanic.
With that stated. When the mysterious ship reorients itself to attack position, I can’t help but feel like it looks kinda like a face. But humans are hard coded to see faces in things, so didnt think much of it.