Earlier quoted context omitted.
This. Life is such a precious random occurrence that failing to protect it in the face [dementia|physical disabilities|etc] is the real tragedy.
As I mentioned in a another comment, framing it as "how one is remembered" is leading to pointless tangents in this thread. The important point is this: are you causing emotional, psychological, physical distress in the real world to those you care about when you have this disease? Yes or no. That's what I care about. Whether they are able to remember me well despite that, or poorly because of that should be complete…
Sure, we can think about how the burdens of caring for our family can be lessened as they age, or how we may help reduce that burden for our family, but family does have the duty to care for its members, and to place such considerations above the intrinsic value of human life is very sad indeed.