Their argument is not baseless at all. Zoning laws ban the building of new homes in certain zones. Zones which do allow housing in America are height restricted

Their argument is not baseless at all. Zoning laws ban the building of new homes in certain zones. Zones which do allow housing in America are height restricted and area restricted. Tokyo allows house building homes in every zone but two. This includes building homes on top of existing buildings where "very little land is available".