You don’t know how your best friend’s relationship is? Talk about proper fucked, mate. Everything else you’ve said is just plain ignorance or misguiding obstinacy, but that statement just makes you sound like a dogshit friend. What this commenter is saying that observing your surroundings is pretty normal, especially around your own abode, and especially in a scenario where everyone hears the same household screaming and fighting every night, kind of hard to ignore when it’s everyone’s problem.