My Mother Ah was nifter recently from YM. Let me tell you she was a health nut.I am a true believer that YM is not really preventable as you see it happens to so many people all types and in every situation. ( of-course we must do everything in our power to be healthy like the Rambam says)
We are not here forever its a short stay CHAP AREIN. Be erliche yidden be the best we can be.
when we bench someone to marich yomim ,we are benching him to have long productive days because it is not about how many years we live its about how productive we are everyday.