The author hints at them twice though, but very lightly:
> Both kinds of magic are partially known to humans [...]
and
> Humans (at least, us in the modern West) are obsessed with their own sense of agency.
I'm personally about as far from "indigenous" as can be, but from what I've learned through various readings & watching interviews, the idea of "becoming one with" or "being inseparable from" ones surroundings is very much part of many indigenous peoples' lives. Not to romanticize them, but this angle could really serve as a reminder in this particular discussion: the "elvish" notion of thinking is not limited to the fantasy world; some of it is very much anchored in real humans' world views.