Unpopular opinion: It's selfish to ask a loved one who is suffering with an incurable disease to stay, knowing they are in severe pain from the second they wake up until the second they go to bed.
My question is: Does it fulfill your life to watch them suffer? Although they appreciate the gentle massages, the glasses of ice water, the chores you do for them when they can't... the fact of the matter is, it doesn't alleviate the pain and it doesn't make them functional again. Not matter how hard to you try to look at their life through your lens, the truth remains: People in SEVERE chronic pain are not living, they are merely existing - and they are SUFFERING through every moment of it.
You all will disagree, but I'd cry more watching them suffer and be miserable through every second of their life than I would after the fact, knowing they are at peace without pain.