I take what was in the paper with a pinch of salt.
While noone would aspire to be in a care home, that one has a pretty good reputation, and the thing which none of us have the age to understand is.. when you are that age, noone remembers the things you do, and that is very lonely. Staying with others your age can be helpful. When you have the early stages of dementia, those are the very memories you do keep and want to talk about.
When he first went there, it would have been beneficial for him to have a short period to settle in with as little disturbance as possible. I understand that now he goes out regularly for lunch... he recently officiated at a charity do, and he still goes off the island from time to time.
His family will have power of attorney, and may well sell things, but only if it is for his benefit. These things are very carefully monitored these days.
Imagine the delight of other residents having Sir Norman entertain them, and his joy at having a permanent audience who probably remember and recognise him better than they do some of their younger relatives!
My father insisted on driving when he was dangerous. After I pointed out to my mother that it might not be themselves he killed (she said that didn't matter as long as they died together) but someone's child (or Bessie the dog, who cowered under the seat!), she phoned the garage while he was asleep and sold the car. If she had not, he would simply have gone on driving.