People hold a full moon banquet. Under normal circumstances, the woman's parents will come, especially those who love her. Moreover, parents can show their attention to women at the full moon banquet, and people on the man's side will not gossip and respect women. Secondly, if her parents don't come to the full moon banquet, it may be that they don't attach importance to women, don't want to attend the children's full moon banquet, and don't consider women's feelings. Another possibility is that parents really can't spare the time that day, and something big happened at home, but sometimes they will come to see the children later and won't always come.
In short, there are many cases where parents don't come to hold a full moon banquet. Maybe it's because they really don't have time, or maybe they really don't care about this daughter, don't want to waste time, and don't care about her being gossiped.