It sounds like where you live isn't actually a luxury building... it's just an expensive but cheaply built building that was labeled 'luxury' to try and justify

It sounds like where you live isn't actually a luxury building... it's just an expensive but cheaply built building that was labeled 'luxury' to try and justify the price tag. The solution here isn't to pretend that high-density buildings aren't needed, because they absolutely are; rather, it's to apply and enforce reasonable standards around noise insulation in shared-wall units, and to reduce the time and expense of the permitting and planning process in general so that there isn't as much motivation to cut corners to save money on the back end.