I not only observed it but have been scolded and cursed that I was trying to make people die of cancer by talking to them about managing weight, eating healthy, exercise so they wont die of cardiovascular complications.
The point is you can't please everyone. These days people want to do what they want. Choose how they live and die.
There is no correct or incorrect. There is no recommended or not recommended. No who and who should do this or that. Everyone free to do what they want.
But as usual humans all selfish. They want A means everyone should do A.
Reality is, despite what doctors do people grow old grow weak and all will die.
From what I have observed, and this is just my two cents. Don't flame me or anything. Live a happy life. Live a life you want. Do what you like. Do what you want. We all die anyway. Does it matter what way we die if we died happy having lived a fruitful satisfying life up to death whenever that is?
One source of great conflict and unhappiness is having to deal with people with different ideas, opinions and arguments. The less people the more peaceful. If there are people have them be of similar values and thoughts as you.
Be happy. And when we go we go in peace and love.