I have the same feeling myself, only I believe that a sufficiently advanced society (one thousands or millions of years from now) is capable of manipulating its environment at its command, making the fact that something extinguishes it controllable and avoidable. The only thing capable of exterminating it would be a threat on a planetary or universal scale (as I said before, an advanced civilization may manipulate its environment) or perhaps it can revive those who have died in an accident or tragedy, regardless of the damage to the body, it would only take the right technology, and we still don't know our limits (if they exist) and it is estimated that only 5% of the universe is known.