One of the occasional mysteries of life is longevity. Genes you say. My mother lived several years longer than both of her siblings. Good healthcare you say? At one point and it may still be true, the oldest person on earth was a Holocaust survivor.
The bell shaped curve has these tiny ends on the bell, the exceptions to the rule. Your doc says you have a 90 % chance of survival. But if you are on the end of the bell and don’t survive the illness, your chances were 0 %.
Death is a horrible thing. Even if one follows every bit of scientific prevention to this point, 40 % of the world’s cancer is of completely unknown origin.
That same scientific method has demonstrated the effectiveness of prayer. Perhaps that is an alternative the non-prayerful should consider. May God bless you every one.