You are absolutely right. I worked in a VA for 23 years. The place was eerily haunted. Stuff happening that no one could explain.
Aside from my own experiences, I have two Daughters who have worked in resthomes for over 12 years. It is so common to them that they don’t even pay attention to it anymore. Just part of the work place environment as you describe.
Until I see “them” personally, I’ve of the opinion they don’t exist.