Good post - and an important topic.
Yup. Doctors see all the time the torture (and when you get down to it, it is torture)people go through with extraordinary end of life treatments. They see it, and they are terrified of having to suffer like that.
No, we're not. It's just that dealing with these matters throughout a career almost guarantees having played out the scenario multiple times in one's own mind and arriving at decisions in advance of other people who don't think about it much.