I can't get past the paywall to read the article. It seems you have a great and totally valid point. My experience is this is a quite complicated matter, so here's another perspective for you.
My immediate family is small, and in the past decade, 5 of them have died. I've been a short-term caregiver, and saw others close to me take on long-term caregiving. I have to tell you, it is a lot of suffering. Go ahead and google it - a significant number of caregivers die before the patient does.
Three out of five of these family members were in denial about their mental health. They insisted that they were fine for years and delayed their diagnoses for bipolar disorder, dementia, and alzheimer's. This denial, the putting off of granting power of attorney, led to over $1M total in asset losses for the family as a whole. I'm certain that leaving their loved ones behind at the poverty line is something they wouldn't have done if only they had been in their right mind...
Just because a patient knows what year it is and who the president is does not mean they are of sound mind, and yet that is the criteria many doctors use to determine if their patients can go back out into the world and keep themselves afloat. I'm not just talking about finances either. I'd bet everything on my uncle sustaining brain damage that doctors didn't detect, then they trusted him to manage his diabetes - lost both his legs a couple years later, then his life too. Yes this is a complaint, but my point is, we cannot leave everyone to their own devices at old age and good health. People involuntarily abdicate responsibility for their own actions.
Individual freedom is very important, but there comes situations where it isn't the answer.