I would argue that caring for people with dementia and Alzheimer’s is a specialized skill set, and that most people don’t have those skills but become forced into situations that can lead to elder abuse and devastating mental health consequences.
Even basic home care for someone with mobility issues is well beyond what can be expected from untrained amateurs forced into caregiving. Seemingly simple things like cleaning up after soiling, shower assist, lift assist, etc, require skill and physical fitness. Non-professionals should be neither trusted nor expected to do that kind of critical care work, nor should our elders be satisfied with those forms of basic dignity a couple times a week.