I’d say it’s because Ballarat is already used for some AFL matches during the season. I don’t, however, see why they won’t consider some of the old grounds from the VFL era, which are used for VFL games now.They showed the MCG, Dump, Pussy Park and Ballarat ??? as the 4th ground to use if we get a Vic hub.
Why not use Cartoon's Princes Park instead of Ballarat?