Earlier quoted context omitted.
Ah, the classic "only monocultures can work toward the social good, if we'd stop accepting 'outsiders' we could do the same" trope. It's tired and xenophobic. The presence of foreigners isn't why laws that benefit already-wealthy real estate developers persist.
It's much nicer to live densely when your 100s of neighbors within earshot don't play music loudly, let their dogs bark, sit on the street playing drums at midnight, etc. like in the USA.
A major factor there is the lack of cars (and higher buildings to wall out car noise from highways) compared to where I live, but even so people are just quiet. It was weird for a while, but coming back to the states I really miss it.