FWIW I think it’s a good reminder that we might want to lead with compassion and empathy and not assume the worst.
That said my H is not hard of hearing and is a super loud talker and I’m constantly shushing him when he takes a call in public. He has no idea how loud he is. We have a middle age neighbor with no hearing loss who is the same when he takes 7 am work calls from his front porch. He has the sense to not want to wake up his family but to hell with the neighbors (our houses are close together).