My problem with your way of thinking is: I was raised Christian with Christian values and in a Christian value system what you’ve described is incompatible.
I call myself agnostic to stop arguing with people but i’m Christian.
And no, quality-of-life is not obvious.
My grandmother got a 30 second assessment while she was napping in a hospital bed.
The doctor said to us: she obviously has no quality-of-life.
He was a peon Doctor but with enough power to put things on paper that could affect life and death.
He was wrong. We let him know. She came home for a few more years.
What is quality-of-life to you?