Yes, but that sum in the US is huge. Drive around the midwest or any region outside of an urban core and its empty space as far as the eye can see.

The problem is large-scale economic and demographic changes. The US used to have:

* A culture that prized living in suburbia away from dense areas.

* Labor-intensive agriculture that provided a lot of jobs in rural areas.

* Labor-intensive manufacturing that provided a lot of jobs in a large number of smaller cities.

All of those forces encouraged the population to spread out. Those forces are evaporating. The suburbs are now seen as soulless sources of miserable commutes. Automation and consolidation has dramatically reduced the number of farm employees needed for a given square acre of land. Automation and cheap imports from other countries have eliminated manufacturing jobs.

Without those forces counterbalancing things, there is a strong trend towards consolidating into large metropolises which can't absorb the growth that quickly.

We can try to stuff every more dense housing in those cities and gradually turn them into concrete boxes. Some amount of densification is good. But instead of investing almost entirely in that, I really wish the US was working to try to make small and mid-size cities more desirable too.