I agree with you on vulgarity but life isn't really fair about this. Just like how wearing a suit unfairly makes a presentation more potent than casual wear. It is what it is.

Being vulgar (even if technically justified) weakens the message for many people, especially when the other party is very polite and professional in return. edit: I would prefer if people weren't like that, but that's just one of the many flaws that humans have. Trying to change that instead of acknowledging it and adapting is an exercise in frustration.

I'm not "affected by mere words", but I do prefer well worded arguments to mere expletives. And I'm not alone in that.