They aren't assimilated. Well literally yes. But their uniqueness is preserved and shared among the collective. That to me reads like how china came in, ended the oppressive theocracy bur let the Tibetan have their language and religion past that. Not how we assimilated our native populations by destroying their culture than never accepting them into ours. My ancestors indigenous culture involves constant warfare so if they had been given that deal it would have been a straight upgrade. I don't think they would have agreed to the transhumanism but it would be objectively better than dying of anthrax cause you slept the barn cause it was warmer. I see it as an extension of the permanent revolution taken to a fantastic extreme.