Except that we don't have the major natural rogue issues here on BT. Right now all the realms are war weary and have all been significantly impacted in terms of wealth, regions and even nobles. Taking a realm that is for all intents and purposes marked for death, and putting it in a location that is known to have no meaningful interaction with other realms is a cheap way out. At least with Fronen controlling it, although it may serve as an income booster, it's more of a 'colony', while they're still forced to deal with everyone on the mainland and still can face consequences.