Is it possible for God to use "physical death" as a means of delivering the "righteous man" from coming evil, and calamity in his life? To me this would not be my preferred method of leaving this earth, unless my work for the Lord had been finished, and there being no need for me to be here. The Lord knows all of our days, the end from the beginning. The Apostle Paul was willing to leave this earth, to be with the Lord which is far better than hanging out in his physical body with all its afflictions, and trials that come with it. He could not decide to either stay, or leave, but he finally chose to stay that the Church would be better off then leaving them. As a Christian we all have a win win situation, as to live is Christ, and to die is gain.
Isa 57:1.. THE RIGHTEOUS man perishes, and no one lays it to heart; and merciful and devout men are taken away, with no one considering that the uncompromisingly upright and godly person is taken away from the calamity and evil to come [even through wickedness]. (AMP)
What about the elderly person who is dying, and experiencing pain through old age in which medical science has no answer, and or their faith is not at the point of believing for their healing. Can our faith produce new physical bodies, that can give us another 70-80 years? Who would want that? Not me!! Our physical bodies are not designed to last forever. There is a cut off point in which we will all experience at some time in our life's that desire to leave and be with the Lord, dropping off these bodies that have been corrupted by sin.
Most of the people that are in unconsciousness state do not have the ability to chose what they want, and so it falls upon their family to chose their fate.
There are not a lot of people who are well aware of their condition who see no hope for recovery or how to get away from their constant pain. I for one always chose life, and trust in the Lord for his intervention. Man has a free will choice to chose what route to take, and like almost all the time, man without the Spirit of God usually chooses wrong.