I don't know the odds off hand. I think the first few years as an infant death rate is still pretty high in the west.
But think about it like this...
Most old people know each other... It seems odd from a young mans perspective.
We may know a lot of people but there is no way we know all of the young people in our communities. If you are lucky enough to make it over 60 or unlucky enough - I wont get into the philosophy of that, then you tend to know most people in your community of that age group. They may not of even have been your friends in high school, they may have been the geek, the jock or whatever. But a lot of the people you know do die as you get older in life. It's a given. A lot of people perish from whatever.
Death isn't exclusively for the elderly.
You hear so many times as well of people who live healthy lifestyles going in their 50s and 90 year old ladies who drink, smoke and everything like that. I think to a large extent it is genetic.
We shouldn't take anything for granted really.
In high school I knew loads of kids who died from illnesses you wouldn't expect 12 and 14 year olds to have.
Then you have loads of people die in car crashes, being ran over, simply hitting their head on a wall. It's misfortune but I don't think it's just a case that their luck ran out. Being involved in a car crash is such an intricate tapestry in the sense that everything prior to that car crash had a knock on effect which causes it.
I don't even think you can stack the odds in your favor beyond a point.
Our whole universe is affected by cause and effect. It sucks to say this but it is of my opinion that our lives are probably pre-determined. I actually wrote about it in a few places and aptly named it causal determinism. I stopped pursuing the whole philosophy thing because it became maddening and depressing.
I was however part of a group called the world academy of art and science which was founded by people like Einstein and Oppenheimer and to this day only has a few hundred people in the world in the group. It's like mensa except a high iq wont get you in.
Having said this. None of those guys on there had the foresight or intelligence to pursue the relentless and proud endeavor of muscle building.