There are two kinds of notes from a meeting: the formal minutes and the ones you keep for yourself. The personal ones are more useful because they capture decisions, questions, and follow-ups rather than a transcript. Writing down the shared assumptions that did not get said out loud is part of this. The point is not to preserve the meeting. It is to preserve what someone will need later.
Explaining the obvious in a note costs nothing, while silence about context creates gaps that surface as confusion months later.