I know of one person, that when their 90 some year old Mother died, said about "She died unexpectedly." A 40, 50, or 60 year old dies unexpectedly. Once you are in your 70's, death shouldn't be unexpected.
But while we are talking about obituary's - recently there was a murder in our area where in the middle of a night, a man broke into someone's house - a fight ensued, and the man who broke into the house got ahold of a gun, and shot the owner. The obituary for him said that he passed away at home.
I've already told my wife, if I should happen to be shot at home and die - my obituary needs to read "He was murdered at home." I would want my great, great, great, great grandchildren (or anyone else for that matter), when looking up genealogy to know I was murdered in my home - rather than "passed away" and wondering "Hmmmmm, I wonder if he had a heart attack?"
Of course, if I died in a car accident - or anything not health related - you might as well just say it. ".... was killed in a car accident." rather than "... on this date . . . passed away."