When people say someone "unexpectedly passed away" without *any* context, it's almost always the dead persons fault. Subconscious shame prevents someone from pointing out that it was the deceased's own fault, like an overdose or driving drunk. If the deceased had been innocent of any immoral or reckless behavior, those who survive the deceased would feel a subconscious need to emphasize the injustice of their passing. For example, "So and so was taken from us before her time by a drunk driver." Or, "So and so lost her battle with cancer." Just my two cents from a long history of internet sob stories.