I disagree with your logic: the fact that there are (even possibly a majority!) of cases when not wanting to live as long as possible is the result of a pathology, it doesn't negate that there are perfectly sane people who do not want to prolongue their life. Just one such case is enough to make their statement accurate - I don't think he generalised those willing to die, but those unwilling to accept that as their choice. Based exclusively on my experience, that is a valid generalisation.
And yes, plenty of people have setup advanced directives, DnR's, and other such instructions while fully on their capacities, and that doesn't require them being in a pathological or even emotional state. It can easily be caused by having a standard of quality of life they intend to maintain.
And yes, plenty of people have setup advanced directives, DnR's, and other such instructions while fully on their capacities, and that doesn't require them being in a pathological or even emotional state. It can easily be caused by having a standard of quality of life they intend to maintain.