Maybe there is some phenomenon whereby a set of cultures (ethnic cultures or otherwise) take turns being the "it" culture, in the eyes of a larger, more globalized culture? EG like version hints at above, Banshees made Irish an "it" culture during Emmy consideration season, not sure if Squid Games had the same effect, seeing as it didn't seem to emphasize South Korean culture per se.
I'd imagine, in the case of the western/US globalized cultural complex, only certain cultures could receive this treatment without it feeling like we're exoticizing some radically different culture. Maybe you could say that about the effect Banshees had, but I think, at least in the US, that particular Aran Islands subculture (or wherever it was set) is close enough to US culture for us to feel comfortable propagating stereotypes, but far enough away for it to be interesting or novel enough to trend in the mainstream mindshare.
Almost like the concept of the "habitable zone" in astronomy, a certain orbital region around a star whereby the planetary body is close enough to have its h2o in liquid form, but not close enough for the temperature to be too hot to sustain what we'd consider life.