Tokyo has an increasing population due to increasing urbanization, and yet as the article claims, housing demand has remained relatively stable. We can have increasing urbanization in the west too without the crazy housing prices.
Further one reason people want to live in just a few cities is because people don't want to be treated like outsiders. I know I'll probably be downvoted for saying this, but I grew up in Virginia but moved to California shortly after college. There's far less overt racism here than back home. I've also been to many rust belt cities, and can say I'm fairly certain those places are about the same as the U.S. South. For me at least, the subjective experience of racism is a reason why there are only a handful of US cities I'd live in.
Further one reason people want to live in just a few cities is because people don't want to be treated like outsiders. I know I'll probably be downvoted for saying this, but I grew up in Virginia but moved to California shortly after college. There's far less overt racism here than back home. I've also been to many rust belt cities, and can say I'm fairly certain those places are about the same as the U.S. South. For me at least, the subjective experience of racism is a reason why there are only a handful of US cities I'd live in.