Our social structures didn't come from nowhere. We share them with our closest ape "cousins." Chimpanzees cooperate within the group, and Bobobos do so across groups. (This is a recent discovery. Cooperation across social groups was thought to be uniquely human. When Chimpanzee groups encounter one another, IT'S ON!)
But my point is that immersion into a social structure is not inauthentic. It's what do, and it's a safe assumption that our ape ancestors did it. To do so is biologically, *authentically* human. I would go so far as to say that the obsession with being an authentic individual, "be yourself," is at the root of many problems we experience nowadays. The internet facilitates self-atomization. We can see all around us how well that is going.
But as rational beings we can choose our story, and we can make alterations to that story. That is why we don't need to wait for biological evolution any more. Our social structures, that is, or stories, do it for us, which means we can evolve consciously.
Are we too late? I don't know. How are the partisans of competing stories to cooperate across story groups?
Music? No, I am not being facetious. The musical group I am in now that I most love contains anti-vaxers, a flat earther or two, and at least one Trumper. But music is magical. We don't care about our differences. We never, or I should say rarely, talk about them during rehearsals or during performance down time. When we do we avoid rancor because we have a larger purpose.
Are we (as a species) too late to have as our larger purpose species survival? Mostly I despair. Microplastics are invading the microworld, that is the foundation of all life. If we entirely stopped producing plastic tomorrow the process would continue for, what, centuries? millenia? We may have irrevocably fucked ourselves, and maybe even the entire living world, without knowing it.

PS:
Keep it coming. I don't read everything of yours but you are always in my feed.