Most of the Core Worlds were nice. They had been part of the Galactic Community for thousands of years, and had advanced socially, and economically. Balosar, however, sucked. The planet was never able to get its crap together. It initially openend up to factories in order to provide jobs and revenue, but this left the planet severely polluted. They tried to entice tourists with their low prices, but so many toursits were being robbed, raped, or murdered, that the Republic issued a travel warning about Balosar. Even Smugglers and Bounty Hunters avoided the place. The main export of the planet was Deathsticks, though these were heavily controlled by outside corporations, so they generated little revenue for Balosar. In summary, Balosar was in such bad shape, the Yuuzhan Vong didn't even bother with it.