Why wouldn’t Neanderthals and early Humans live past 30 when elephants and mammoths routinely lived into their 60’s or 70’s?
There’s a fairly well-known Neandertal who’d clearly reached something like old age, and was disabled to boot, who must have relied on his nearest and dearest and/or the group he was an honored part of. This study is based on too few samples and too little information to make such a sweeping generalization. But that’s so-called Scientific American for ya.