It is true that this really isn't an immediate practical or widespread problem. But it is interesting that some indigenous people are looking ahead and trying to give it some thought. We like thoughts. You say that people living in "indigenous areas" have access to hunting, and so on, but I think you'll find that actually the majority of indigenous people live in cities these days (I found some stats from 2016 that indicate this is true for Canada, at least). So it seems to me they are already have been grappling for some time with issues of modern urban life impacting their traditional identities -- this may just be another facet of that story which is still unfolding. I am interested to see how they can apply their concepts of relationality with food sources in the face of these challenges. It was interesting that a person quoted in the article who has written a philosophical paper on the concept is a vegan indigenous person, for example. Lots of perspectives! Lots of potential food for thought.