This probably isn't SE's fault. You're not allowed to just sell anything you want anywhere you want. I'm sure SE wold love to have a worldwide store where anyone in the world could just buy the game and play, but it's not that simple. Many countries have specific rules or licensing issues that prevent, or at least make it cost prohibitive to run the game there. Places like China and Korea have enough players to make dedicated servers worth the investment, but that's probably not true for most other places that can't use the 'global' (JP/NA/EU) server sets.