No, Density is not the thing that makes it bad. Tokyo and plenty of other highly dense cities are perfectly livable. The issue at hand is that many economic ce

No, Density is not the thing that makes it bad. Tokyo and plenty of other highly dense cities are perfectly livable. The issue at hand is that many economic centers like San Francisco are adding several times more residents than housing units. There's onerous zoning and processes by which existing residents can block new housing. There's also price controls that disincentivize housing. These factors cause a chronic undersupply of housing, making housing very expensive even though San Francisco isn't all that dense. That's why almost all the YIMBY attention is on urban areas like these experiencing housing shortages. Why would they push for more housing in suburban and rural areas that aren't experiencing chronic housing shortages? Most rural areas have shrinking populations.