All 'swear words' has a 'non swear word' synonym or euphemism. Therefore it's utterly and thoroughly unnecessary to swear. Even if you wished to use an expletive to 'enhance' a sentence, you should be smart enough to phrase it so it has a similar connotation.

Incidentally I can write rather insulting things without swearing or even using idioms or slurs. Those are also not allowed in these fora I think. So it's not just swearing and explicit content.