Although it can be argued that the online world is different from in real life, the people using these platforms are real so the effects are just as real. There will be times where the texts are posted as a joke (usually it's not a joke if it has to be claimed as a joke) but the fact that it's typed and posted suggests that the user had some strong feelings about whatever issue it was. In short, it does matter to both themselves and potentially those who are impacted by those words.

On top of just respecting parents, Confucianism seems to also have set rules for women respecting their husbands if they are married. There is a patriarchal system set up which follows this belief and if the women don't follow it she will be considered "bad."