About behaviour...I believe people get "more like themselves as they age"traits get stronger.so something the families say may be so.also I think seeing the decline of a parent is lifes reminder of our own aging an passing.Many people hurt the person who does most for them..so a loved family member may have been verbally attacked many times before care is sought.
looking after anyone...baby or adult or elder is hard work and these grown family may be low in stamina..
Having many carers is often a good thing..spreading the expertise.
Care giving as a job is very hard work yet always has been too low paid.