If you want to use a more precise definition of "state" you should be more precise.
The intended definition was clear in context. Pedants are at liberty to disagree. A bit of googling suggests that VK0 actually covers a rather larger area than VK6, as does P[P-Y]8 (but it covers several states within Brazil), and VE8 (which seems to cover more than one Canadian state (or territory, or whatever)). There's probably a similar subdivision in Asiatic Russia, too, but I can't be bothered to hunt the information down. 'cos who gives a monkey's anyway.
Whichever way you look at it, Western Australia, covers quite a large area of land, and Perth is far enough from anywhere else that it's fairly hard to find "local" QRS CW (or any other "local" contacts, come to that).
Cheers. The membership list has 5 VK6 members listed.