It's a forum for people to discuss FFXIV related information and ideas amongst one another. It was also made so we could discuss FFXIV related ideas and information with SE and help shape the game. That is why it is called the FFXIV Official Forums, not the FFXIV and Off Topic Official Forums.

If you wanna talk about Off Topic stuff there is Zam, Core and like a hundred other FFXIV forums that allow off topic.