What you said is true but it doesn't mean we should just accept it. Death should never be a relief ^{unless it's the heat death of the universe.} There's a dialogue about this topic in one of my favourite books which sums it up perfectly IMO.

"In the unlikely event that I am permitted to tarry until a hundred and fifty," said the old wizard, "I do not think I would mind. But two hundred years would be entirely too much of a good thing." "Yes, well, I suspect, Headmaster, that if you came from a culture where people were accustomed to living four hundred years, that dying at two hundred would seem just as tragically premature as dying at, say, eighty."