There is a logical problem in what you're saying. When a person gets to the point of requesting medical assistance in dying, autonomy is no longer being exercised. Even if they made a previous guide, the benevolence and choice of other people is all that applies for us, unfortunately or fortunately. Unfortunately, if we believe that dementia is a condition of terminal decline for which care should not be given...
On April 25th, 2022. See this statement in context.