The problem with that, @Cornelious , is that wishes change. At forty you might think I want to go into a home as soon as I start to struggle, don't want to be a burden. You think the same at fifty. But at 60, those years are looking a lot closer and you still feel fine, you still work, you're not even retired yet! Then seventy, and yeah sometimes you forget things but hey doesn't everyone? At 75, ok, the house is a bit hard to look after now but you're ok, you don't need any help, you're definitely going to get that problem fixed, people should keep their noses out, you're a grown woman for goodness sake. Eighty, and you don't know why people keep making such a fuss, the house is fine, you don't need to use those rooms anyway and you can't trust tradesmen they all want to rio you off, so you aren't letting anyone in. Eighty-five and all those pills they want you to take are stupid, you're fine, and the doctors are wrong, the home carers are stealing from you, you'll be dammed if you're going to take me out of my house and stick me in a home.
What happens then? Someone says "listen, when you were forty five (forty years ago!) you said you didn't want to be a burden and would go in a home, so hop it!"