Imagine though, some people might not be able to afford a place with more sound-proofing. Mandating it doesn't magically make it free. This is how we ended up in the situation we have in the first place where its too expensive to get a roof over your head because of hundreds of little rules and stipulations. Would I prefer to sleep under a highway overpass or sleep in an apartment where the bedroom doesn't have a window? Would I really care?
And just because you mind living with noise doesn't mean everyone does. Why should we outright ban places like that if there are people who might not be able to afford something better, or don't care and would like to save some money?
Like, your entire comment is part of the goddamn problem. Don't legislate your preferences.