Let he who has never lost track of car keys cast the first stone.
This may turn on the curve of experience.
1) On the first few times the task is new and everyone is on edge to check everything.
2) Then there is the dangerous period, where some are thinking "I've got this" and they don't.
3) This is followed by the long term, where the repetition is such that missing a task practically makes people itch; they don't even have to consciously be aware, they just have a built in reflex to know they missed something and to turn around and look.
Since this door is installed and then removed and then reinstalled, but everyone knows it won't really be used, there is a good slot for the second state to happen.
I'd like to be looking at the procedures and sign-offs that go along with that re-install. Like, is there a re-install checklist taped to the door with a list of all fasteners that need to be put in, like a more sophisticated tag-out operation when servicing a machine. And a placard permanently on the door that the door shall not be removed without first affixing the checklist.