> It might be a sensitive topic, but apart from small things like knowledge of medicinal plants, there is little to be learned from niche cultures in terms of technology or even the advancements in art.

That was the fundamental belief behind the eurocentric approach to anthropology, and other ethnocentric supremacist belief systems which from ignorance brought a lot of hardship to the world.

You don't have to look far enough to see how your culture, not long ago, was just as niche and pointless as the ones you're criticising now. You should also know that dominating cultures have already succumbed into irrelevance in spite of all the supremacist beliefs. Perhaps there's something to be learned about poopooing other cultures