There is a difference between taking a life and chosing not to extend a life by artificial means.
I have a very strong DNR in my health care directive: if I can no longer recognize my family, palliative care only. That's not taking my life, it is preventing the unnecessary prolongation of my death.
It seems to me that many people are afraid to meet their Maker.
You are free to make whatever directives and provisions you like. I think if somebody wants to spend 100% of their income during their lives and leave just enough money to put themselves down like a dog when they get ill, that is their business.
I just don't want the state calling the shots. If the state foots the bill, the state will call the shots.