A little illumination, madam.
I’m deaf. Can’t hear.
Then what’s the point of being there?
Sir, there are many people who are deaf. If no medical intervention is possible, then they have some choices to make. They can choose to avoid social situations that are unpleasant to them (pointless concerts or dinner parties that are going to be annoying, for instance). They may choose to explain that there is a problem and ask for an explanation of the conversation so as to avoid offending others.
They may also simply decide to act polite for the duration of a meal. Usually if we care about people and don’t have a desire to pointlessly offend them, we choose to act polite; after all, manners are devised to make others comfortable.
Remember that we all have problems and issues. Deaf or not, we may all have to sit through parties we don’t like or be courteous when we’re bored. Deafness, which is a very common problem, isn’t a license to offend others. If you don’t want to deal with a dinner party for half an hour, then don’t accept the invitation.
Please note that very few people on this thread are supporting your action. Neither my father nor my father-in-law, both of whom were functionally deaf, ever read during a family dinner or dinner party.