S-E are a lot bigger and know their products will sell no matter what, they can afford to fund localization before they know whether they've got a product that will definitely sell overseas, so their script writers probably work with their western counterparts from the get-go. Despite that, the process probably pushes the worldwide release back by a margin, whereas this approach keeps the Japanese release forward.
People, even fans, should stop acting so unreasonably entitled. Nobody's out there planning ways to piss their audience off, it works out the way it has to, and the game will be here eventually....