Interesting point. At a late stage a doctor will presumably give a large dose of morphine to control the pain

and insure death follows quickly - is that the way it is done? One could argue that this could be done earlier if there is no chance of recovery

but which doctor would agree to this if asked by a patient who is of sound mind. That doctor might think that the patient wants him to assist

the patient in suicide by doctor so to speak.

Some religious people say that pain is part of the process of gaining access to eternal happiness in the after life. Pain relief should be administered, of course

but not enough to kill. I really don't have a fixed view on this. A very difficult decision for all involved.