Right—the problem is not that building apartments that actually support people's needs (beyond the bare minimum) is impossible, it's that it costs more money th

Right—the problem is not that building apartments that actually support people's needs (beyond the bare minimum) is impossible, it's that it costs more money than the bare minimum to do so. And if there are no sound-dampening apartments available in a particular area and price range, then the apartments you're trying to rent out not having them isn't a competitive disadvantage, so why bother?