My grandmother was in good health but my mother didn't want to assist her (Medicare-provided) caretaker anymore and wanted her assets. She and my stepfather manufactured a scenario in which she took a fall, then stuck her in a nursing home and she died within a year. My mother knew the rules and got what she wanted without any repercussions (beyond losing contact with her only son).
The vast majority of people admitted to nursing homes have loving decent families.
I have seen other situations where the family tries to take care of someone that really needs to be in a nursing home and ends up neglecting them. I think neglect is far more common-- and more indicative of greed.
The vast majority of people do NOT have loving, decent families. You are lucky to have that world view but you should consider the possibility that it is quite flawed.