I'm not sure what class of error this is, but it's a common reasoning mistake in discussions on evolution.
By your same logic, you could pick any species at all and call their traits "the winning strategy for long-term survival" as long as you live contemporaneously with them.
There are known species that don't seem to exhibit planned senescence--the naked mole rat is a commonly discussed example. Check the Wikipedia page for biological immortality[1] for more examples and info.
The article essentially claims that ageing is likely a result of interacting thermodynamic processes. If so, then without specific preventative measures, organisms will "age".
The discussion at this level is pretty hand-wavy. So without introducing more rigor, the best we can say is probably something like this: there hasn't been strong selective pressure in the past to develop anti-ageing strategies.
Exactly. Some tortoises as well can live a few hundred years, as well as wales, urchins, sharks, quahog clams, and as someone else mentioned– jellyfish.
Though you won't see any of them developing rockets and space-stations. To what extent that is an evolutionary advantage on our part I'll leave to general consensus.
All species that didn't die of old age (if there were any) have disappeared regardless.