this is not a bad question at all. I used to wonder this type of thing, because one would think that the profanity filter would achieve the end result. But let me paint a scenario:
You queue for a random bg and everyone is popping off on each other. Someone on your team goes off at you specifically, maybe because they are having a bad day but you don’t know enough about the situation. You just joined, as far as you’re concerned.
Billy Bob calls you some kind of explicative. In the chat, that is replaced with growlixes, those little punctuation and other marked symbols like &, $, #, @, etc. put them together in a random order and you get the idea.
Now, for the sake of abiding by the forum rules, I won’t type growlixes in succession because I don’t want to seem like I am intentionally swearing to make a point. But in leu of growlixes, I’ll say beep instead.
If someone is, say, using a derogatory slur, and they say something along the lines of “nice try beep you play like a beep go beep bla bla insert a ur mom joke here” etc. it doesn’t really change the fact that the language used is intentionally inflammatory by design. It’s mean spirited and downright hurtful, not to mention that anyone with a functioning brain can simply fill in the gaps. That is to say we all know exactly what you mean to say in that context.
If this was an isolated incident and you are having a good day, you’d probably think the reaction was simply not proportional to the game at hand. So you might think it’s funny. Haha, you go about your day.
Other times, maybe you’re not quite there, and when people come into the game and spam you with that type of nonsense and maybe, just maybe, one of those incidents just rubs you the wrong way that one time. And it’s enough to lower your mood, which in turn means that you are not enjoying the game and are significantly more likely to pass off that negativity onto someone else.
This goes on for long enough, and you will end up with a game a lot like WoW. A game where people are genuinely upset and malding over a social contract which basically ammounts to little more than a friendly, friendly neighborly reminder that people should consider being nicer to their fellow community.
That was an overly cumbersome way of saying that people already knows what the growlixes mean so censoring them effectively doesn’t ammount to much, it’s just a way for the game to not have a bunch of slurs and other unnecessary language cluttering chat.