For me, it is probably in line with their thinking on other games in the series: There is an intended and rather fixed storyline, however Square-Enix enjoy not telling the users exactly what it is/was. This is because they prefer their fans to discuss between themselves what the 'true' storyline should be. I am happy for this - if they did not leave so much still open for discussion, a lot of these forums would be far less active! FFVII and FFXIII both strike me as other great examples of the development team not wanting to be drawn into telling users what is right and what is wrong.