While that could be true, it wouldn't point to the root cause. There exists a limit to how fast an area can physically develop by modern construction speeds and

While that could be true, it wouldn't point to the root cause. There exists a limit to how fast an area can physically develop by modern construction speeds and government permitting procedures, orthogonal to the area's willingness to develop. It's possible that 600k population Boise area is unable to build as fast as California's 700k yearly exodus would like to be accommodated.