[xelxebar]

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.

[1] https://en.wikipedia.org/wiki/Biological_immortality