So what? We humans care.
For whatever reason, hardcoded death was the more successful route for a species to take. (with some notable exceptions. I believe there are species of lobsters that won't die if you put them in the right environment, I believe a species of jellyfish as well, and then some microorganisms as well)
Purely biological success knows nothing of the societies we have built and the knowledge, ability to experience, and the complex contexts within which we all live our lives. Death really doesn't make sense for an individual, and no one is really itching for Humans V1.1 so the idea of letting evolution continue doesn't make much sense either.
If I could stop aging right now, I would be content with what I am capable of. Even if I die in 30 years from bus to head syndrome, I will have been fit and active for those years and that is a much better situation than slowly deteriorating to death.
That is the reality medicine has given us already, and anti-aging is only the focusing of a subset of general health issues that tend to cause problems as we age. It isn't the search for the imoral and exclusive elixr of life as some people seem to claim it is.
Then why are we spending so much energy trying to augment ourselves? Better exercise, better diets, better schools, less disease, etc.
I would say that almost everyone can name something about themselves that they wish evolution had optimized more. (And if not evolution, then direct intervention).
Perhaps the version was number a bad way to express that though!
Dragon Flys only live for 4 weeks, but its enough time to reproduce and that's all "mother nature" cares about, and hardly anyone would suggest that living 4 weeks is long enough; so we need to understand our lifespans are just as arbitrary.