Not really. Having offspring & re-mixing genes in them, is one way how species (not individuals!) adapt to a changing environment.

Bacteria do that in ~hourly intervals, humans take decades, some plants can span millenia.

So you could say the 'update interval' is tuned to how fast-changing a species' environment is. A balance between energy 'wasted' on re-building individuals from scratch, vs wasting energy by having poorly adapted individuals.

So 'immortal humans' to me reads as: humans optimized for a caveman hunter-gatherer lifestyle, while living in Star Trek like tech-heavy surroundings.

If anything, humanity would be served by shorter lifecycles, until tech advances stabilize somehow (?). Okay a few individuals living way longer could be good. Eg. billionaire tech bros taking that spot? Please nooo!!!