You cannot stop diseases from occurring.

You cannot stop people from aging, and from their bodies deteriorating.

They would be experiencing the ailments regardless of your choice. Early choices in your life may have caused added stress in their lives, but they chose to be there for you.

I don't have a problem with your views. I think there is an issue that you are attributing their hurt to yourself completely. Everyone is going to get sick and die eventually. That is the reality of life.