That is the irony about dementia and losing control of your personal freedom. When you are with your senses, you want to think that you don't want to die in a nursing home when your quality of life goes into the crapper.I'll be 86 my next birthday and feel blessed to have most of my marbles still about (I'm sure some here would disagree). I honestly don't know how I would react to a cognitive decline diagnosis. One friend, a bit younger than I, got an unfavorable diagnosis. He and his wife went out to dinner and he excused himself to go to the restroom. Instead, he went out to their vehicle, retrieved his pistol, sat down on a bench and blew his brains out...
We watched my Dad succumb to Lewy Body Dementia, and my Mom to Parkinson's. I don't know about my Dad, but my Mom had been doing research on the Hemlock Society, assisted suicide. It was never a real option for my Mom in MIssissippi.
It is always the present thought that you would wish to go out on your own terms. Not too many people are able to do it, sadly. And it's also unfortunate that people will take extreme measures such as guns, or grab a rope.