This seems relatively common among ancient hunter-gatherer societies. We've been watching Prof. Jiang's excellent "Story of Civilization" course on his Predictive History YT channel[1]. In the 2nd or 3rd video, he mentions that the remains of somebody with a rare form of dwarfism were found as part of an ancient hunter-gather tribe, and they had the same levels of nutrition as the able-bodied members of the tribe.
Maybe "primitive" people were not so primitive after all..
[1]The course is here: https://www.youtube.com/watch?v=Jjqf9T59uY0&list=PLREQ8S3NPa...
Agreed. There is a background cultural assumption in the Western world that the "state of nature" [1] is one of constant suffering. What I know of anthropology suggests this is bullshit, and the truth is that there have been a huge variety of social structures in our prehistory. "The Dawn of Everything" goes into this.
[1]: https://en.wikipedia.org/wiki/State_of_nature