Resigned and cynical...that's me.
It's like picking the correct parents to be a professional athlete.
It doesn't mean it's going to happen, but it means it's possible and more likely than not.
I think most of us here would like to live for an active and healthy 65 years, rather than 18 years of youth, 4 years of college partying, and then 30 years of working and slow physical decline, then twenty years of increasing frailty and deteriorating health.
I think making the correct choices is going to help.