Family dinners have a particular silence, and there is usually one person at the table who breaks it. A remark about the gravy, timed exactly, and the whole room exhales and starts talking again.
That is not a small social knack. It is a form of labour, and it is very often done by the person who felt the tension first and could not sit inside it. The table rarely knows this. It only knows the evening went well, and that you were there.