I lived for a few years in Seoul, South Korea between 1988 and 1992.
Koreans, at the time, lived in a very modern society and yet retained vestiges of their caste-based social system they've had for centuries.
One of the curious aspects of which was that showing what Westerners consider "common courtesy" was a tacit admission of social inferiority.
Many Koreans felt that letting someone go first, waiting in a line, even stopping for a stop sign was equivalent to admitting they were socially inferior to everyone else. Something most Koreans were loathe to do.
The upshot of this curious system was that no one waited in a line (every line became a rugby scrum), no one moved out of each other's way on the sidewalk, and even something as simple as a traffic circle became unworkable because no one was willing to yield to anyone else.
Thirty years later, since many Koreans have traveled overseas, most Koreans now see that this is an unworkable system and have adopted a more mannerly way of dealing with each other. But, even during my last visit, just before COVID, you could definitely see it continuing to happen. It was just not as wide-spread.