I think this relates to America's NIMBYism: In the places where there is enough density to support this stuff, the sorting from insufficient housing has made to

I think this relates to America's NIMBYism: In the places where there is enough density to support this stuff, the sorting from insufficient housing has made too many rich residents that are not sufficiently price sensitive. If we had abundant housing and thus poorer residents on average (in a relative sense), we would already have these labor-saving amenities. The fact that cities are both more efficient and more expensive demonstrates just how fucked up the economics of all this stuff has gotten.