Given that history, and the usual men dying early, I guess, to the extent I thought about it, that I always figured Dad would go first. Alas, Mom passed at 74 from cancer, but Dad made it to 93.
Evidently, mortality/longevity depends on four factors:
1. Genetics
2. Environment/behavior
3. Psychology/willingness to live
4. Luck
Only (2) and (3) are controllable. The genetically-blessed and the otherwise lucky, might live to 90, despite being obese alcoholic chain-smokers. The teetotaling star athlete might get pancreatic cancer at 55, and die at 56. It's remarkable how, beyond some obvious things, so little remains within the purview of our control.
Then there's the psychology. An acquaintance is 73, but in horrible physical health. Diabetes, obesity, all sorts of ailments related to... whatever it is. And he's been on-again/off-again suicidal for the better part of 20 years. If he had a bathroom medicine cabinet, it would be overflowing with prescription vials... instead, the vials are strewed about the floor, the couch, everywhere... and he doesn't often remember to take them all. His will to live is negative, and yet, he soldiers on, somehow. Still others, are maybe 20 years older, frail and organized and well-sorted, with incredible will to live.. they also soldier on. Not sure that I have a concerted point here, other than to note, that psychology is scattershot and variable... but somehow, it also has to matter.