What a story to back up your write up. This won't change my perception about the old saying. It is better late than never..... The old man seems to realize that he has done damage to his health but the decision to quit is not late. He might definitely have a short time to live, but with good medication, his life span could possibly increase maybe by additional two years or more.
The basis truth is that we shouldn't give in to any situation. It might seems too late or no benefit, I bet you, do it first and see the great advantages that will manifest from starting....
Do have a blessed night rest