I’m sorry, but here’s where I call B. S. on caregivers’ surprise at this behavior and lack of putting themselves in their charge’s place.
Thought experiment: Okay, you get pulled over by the police. Maybe you were speeding or texting on your phone or accidentally ran a red light or were coming home from a party and had a few drinks or maybe you can’t think of anything you’ve done wrong. Do you: get extremely nervous, admit to every possible transgression you may have committed and ask the officer to write you a ticket and take you to jail, or try to project a calm demeanor, admit no wrongdoing, wait for the officer to tell you why he pulled you over, and do everything you can to avoid a ticket and/or jail?
We’ve been conditioned all our lives to be careful what we say around legal authorities and strangers, and other people with power. I don’t care who you are, what your mental state is, or whether you are guilty of anything or not, your behavior is different in front of policemen, judges, doctors, lawyers, teachers, or any authority figure with power over yourselves or your loved ones.
It seems you are faulting people for behaving in a more rational fashion. Wasn’t that the point of someone calling the police in the first place? A policeman’s job is largely de-escalating tensions, hopefully without taking someone to jail or firing a shot, etc. They call them peace officers for a reason. Their uniforms, badges, vehicles, tools, weapons, sirens, flashing lights, loudspeakers, voices etc are all projections of power used to deter and defuse social tensions. And guess what? They work.
Now I understand you might be puzzled if they return to similar previous behavior when officers or other outsiders leave, but this is commonly reported in domestic calls or when social workers visit etc, in contexts where mental illness isn’t a primary concern. Or in the workplace when the boss is away on a business trip or vacation, in school when a substitute teacher leads class or a supervisor observes the class. There are studies that note these psychological effects. One that comes to mind in the workplace is the Hawthorne Effect, but there are many others. In Physics there’s the Observer Effect, and Heisenberg’s and Schrödinger’s work. I’m sure there are examples in Philosophy and other fields. Bottom line is when people are aware they are being observed or there’s the possibility of being observed, behavior changes. Caregivers tend to see the worst behavior of their charges, because they are around them the longest and see them in familiar settings.