My sister works as a nurse in a geriatric department her attitude is “if I make it to 70 I’m going to start smoking”. She’s seen plenty of people with healthy bodies and destroyed minds to know she’s rather avoid that kind of fate.
No kids/grandkids for me so I don't see much value in old age.
I have to live now and only have 15-20 good years left. Once that time comes it is time to party. Cigars, weed and rum. A broken down physical body with an even more broken down mind is a fate worse than death to me.