Phonotactics: Don't put that there!

XD; True. To a certain extent. I wasn't trying to ask why we "created" them (that doesn't usually happen in languages), but more why that feature of language evolved.

Then you should be grammatically correct next time >:(

If everyone was grammatically correct, then grammar Nazis would be out of business. D:

But that is a good thing. At least everyone would be literate then.
It's like saying all the cops would go out of business if crime ended. Their point was to end crime, or at least stabilise it.
And I used an "s" because I'm cool like that >:3