Why is that a good thing? The profane and vulgar simply reveal themselves as asses. But the bans actually accomplish little of value. Mostly they are used to enforce the orthodoxy on any given site.
The “cure” is worse than the “disease”.
I have a very small “issue page” on Facebook and the rules there don’t allow profanity of any kind, because it’s a family-language page and the kids in the family should not be subjected to that, while Reading about other major issues!
And secondly there is absolutely no allowance of illegal threats to anyone, no matter who it is. Something that is violent and done in the course of the law, and thus legally so, is allowed.