For one, which large cities in NA have any of that? They've got buildings that are not new all over.
Also, what is "new"? I've lived in buildings built in the last 10-15 years that were definitely still paper thin.
Heck we have several tens of meters between us and the neighbors house and we can hear them sometimes.
The other thing is for example balconies. There's not a thermal or insulated wall new building thing in the world that is gonna save you from your downstairs neighbor chain smoking on the balcony all hours of the day. You can't sit outside in the afternoon or on the weekend enjoying life. You can't sleep with the window open (fresh cool air required for proper sleep).
At least because you live in a city without cars you can have the window open during the night without noise pollution, right? We'll sorta because the neighborhood youth is out three stories below, gathering and having "fun" while you are trying to get the baby go to sleep before you yourself pass out from exhaustion. All the while annoying the elderly couple three balconies over with baby cries yourself.