I'm not sure about the differentiated functions thing because that implies some profond anthropological and philosophical implications. I think we have to be careful before jumping to conclusions and dig deeper beneath the surface of the appearances. As a reminder, socionics typology is just a theory which pertains to a part of the psychological structure of individuals
and the dynamics of interactions of those individuals within the context of a given society. From that perspective socionics is both a typological system at the Individuals level and a sociological system at the group level (Small groups and Socion).
With that said, being perfectly integrated and adapted to an ecosystem is the proper of all the species and in the order of things so to speak. However, human beings have a unique potential of adaptability to a variety of ecosystem and even create its own
if need be. The human brain has evolved (or has been designed (?)) to be that way. The major influence of the environment which lead to the evolution of the human brain in order for the humankind to survive have already been made that is to say that every human being have the potential to be perfectly integrated to an ecosystem and live in harmony with it
under certain conditions. After all we are but animals and as such biologically a product of nature programmed to live symbiotically and the great faculty of adaptation of our species is what made us the dominant species on this earth.
Now, back to the 8 functions legitimity of existence (awakening ?). The idea that psychological functions (which comes in pairs !) or archetypical functions need a reason to exist in order to be developed is interesting and probably true. However, it will take generations upon generations I mean a very long time under symbiosis condition for nature to update the human being programm so to speak. It's funny to know that there isn't a time metric to measure the time of evolution of species (maybe there is a the unicellular life level (?)). My point is whatever the structure of our psyche might really be and whatever the model (as long as it is internally consistent) we use as a reference, that structure hasn't evolved significantly to the point of the emergence of a new human species and after changes upon changes we are more or less the same (~ lie la lie, yes I'm quoting a Simon and Garfunkel song !).
Therefore, When it comes to "primitive societies" or groups of human beings living in symbiosis with their environment depending on how we see it, If we think in terms of socionics the 8 function model is still valid and for instance the Piraha might not value some IEs not because they don't exist but just because they don't need value them (or so it seems). The fact that they don't measure time or speak only in present (and here we are obviously in the "trust me bro" zone) doesn't mean that Ni doesn't exist in their socion, that's a bit simplistic imho (not that I have something against simplic, on the contrary). As a reminder there a lot of languages don't have grammatical tenses, those are called
tenseless languages are well known in linguistic. Since a lot of us here are Japanophiles, we know that Japanese language doesn't have a Future tense.
Now, the fact that they don't have integrated the notion of numbers obviously doesn't mean that can't do rudimentary math even if it's not accurate they at least have a sense of estimation and proportions. I've seen that every Pihara knows the names of insects, animals, plants etc living in their environment. They also know how they live, their behaviors and even how and when to use certain pants and insects for a given purpose. They live in harmony and equilibrium with their environment, there is an abundance in resources compare to their population, a sort of self-sufficiency that rendered agriculture and rationalisation of ressources unnecessary (Necessity is the mother of invention - Plato ).
I don't know how that tribe do it but there must be an educational system that prevents dominant types to express their true nature. Emotions, positives and negatives are an expression of the human condition. There have been times when the Puraha wanted to kill Daniel Everett and his family for whatever reason. That's the expression of the human condition, The Piraha don't like strangers and they don't like them to integrate their group because their are different, that the expression of the human condition. What can we say about that ? What are the expression of IEs awareness we covered so far ? All we can say imho is that no matter where we are and how we live, we are just an expression of the human condition. Anyways, sorry for this long post and note that I don't know what I'm talking about.