The fact that a structure has been established is not "natural" - it is man made, as evidence by the fact that other people who live in other places and other times created different structures. This is not wholly shaped by the environment - it's shaped by the will of the humans who create the laws, rules, and mores of that structure. To believe otherwise is to treat "primitive" peoples as unsophisticated, unintelligent, and fundamentally less than modern humans.

"Like many North American peoples of his time, Kandiaronk’s Wendat nation saw their society as a confederation created by conscious agreement; agreements open to continual renegotiation. But by the late nineteenth and early twentieth centuries, many in Europe and America had reached the point of arguing that someone like Kandiaronk could never have really existed in the first place. ‘Primitive’ folk, they argued, were not only incapable of political self-consciousness, they were not even capable of fully conscious thought on the individual level – or at least conscious thought worthy of the name. That is, just as they pretended a ‘rational Western individual’ (say, a British train guard or French colonial official) could be assumed to be fully self-aware all the time (a clearly absurd assumption), they argued that anyone classified as a ‘primitive’ or ‘savage’ operated with a ‘pre-logical mentality’, or lived in a mythological dreamworld. At best, they were mindless conformists, bound in the shackles of tradition; at worst, they were incapable of fully conscious, critical thought of any kind.

Scholars still write as if those living in earlier stages of economic development, and especially those who are classified as ‘egalitarian’, can be treated as if they were literally all the same, living in some collective group-think: if human differences show up in any form – different ‘bands’ being different from each other – it is only in the same way that bands of great apes might differ. Political self-consciousness, or certainly anything we’d now call visionary politics, would have been impossible."

Graeber, David. The Dawn of Everything (pp. 95-96). Farrar, Straus and Giroux. Kindle Edition.

So sure, continue to treat "primitive" people as not as conscious or intelligent as modern humans, who make intentional laws and rules and decisions every day of the week because it suits your narrative, but it doesn't make it true.