A surprisingly large amount of my views on this are based on watching pigeons in the city centre. The variety of horrific leg injuries and what not they have gone through. And yet still they persist in trying to live, hobbling around on stumps. It must be so painful. Goodness knows why they don't try and die. Maybe it's because they don't know how to.
Anyway, I watched them long enough to decide that since they had it far worse than me, but still carried on trying to stay alive, that I may as well too. So for me me at least life is worth fighting for, which in turn means that I find it hard accept that anyone who chooses to refuse a treatment is in general being rational. There are specific cases where it's impossible to make such a sweeping statement, but anyway death does not strike me as a rational choice. That, coupled with being perhaps overly scientific about some things, is what leads to my position.
At the moment anyway. I've not yet had anything happen near having to make the choice you've made, which is certain to shake things up again. So again it's certainly