squeak, speak to someone who has a family member on life support. for them there is no “better use” than to keep their family member alive.
i have a close friend whose grandfather was injured terribly. it must be over ten years ago by now. he’s been on life support ever since. he’s alive, but they claim he has no brain activity. the rabbonim even said to stop davening for a refua for him. but he’s still here. speak to any of them – there’s no way in the world they’d give it up.