Saying republic city is westernized because other cosmopolitan asian cities are also doesn't make sense? Because those cities have western influence due to imperialism and colonization from the west. In the avatar-verse what we know as the "west" (USA and Europe) doesn't exist, there's no such thing, the closest equivalent would be the former fire nation and even that is a stretch. The creators had a perfect opportunity to imagine what a modern asian society and world would look like without western influence, but apparently, to their minds modernization and progress is not possible without the west.















