This isn’t a case of prioritising one life over another though, it’s a case of looking at the impact of treatment on various individuals, and the likelihood of success of that treatment.
And I agree with @ HazyJuly that DNR is something which everyone should talk about, as well as what measures they would and wouldn’t want in the event of serious illness.
People throw out the word DNR as if it is the worst thing that can happen to people. And yet there is very little discussion of what CPR and resuscitation involves, and the potential impacts on the individual. E.g. someone who is resuscitated in hospital has only a 20% chance of survival, a high likelihood of broken or fractured ribs and added to that the possibility of punctured lungs. Added to which there is a significant risk of brain damage based on how long the individual is deprived of oxygen. So you could bring someone back only for them to to spend the rest of their lives in a vegetative state. Would you want to live like that? I wouldn’t.
CPR is absolutely brutal, I’ve been there. And frankly to put a 90 year old, any 90 year old through that is barbaric.
This isn’t just about talking about DNR, it’s about talking about the wider implications of certain interventions. How much treatment would you want? At what point would you want to have all medical treatment withdrawn in order that you could slip peacefully away rather than live the rest of your life in extreme pain, possibly with no understanding, no movement.
Decisions have to be made on the likelihood of someone’s survival and the likelihood of their quality of life in the event of e.g. CPR. It’s not a case of choosing one life over another, but we need to accept that we can’t always provide life at all costs.