I think it's rather brave, he prefers to release it when it's ready rather than release it half finished in detail.
That's what makes it a great game.
They dared to confront their marketing teams who must have been pressing them to get it out early.
Two more weeks of waiting won't kill you, it would be a shame if it came out with a lot of bugs and a story that didn't hold up well for a grand finale.
And besides, with the number of pre-orders and new accounts, they know the fans will be there. There are still people waiting to create new FFXIV accounts.
Look at CD Projekt who didn't have the courage to postpone their releases, the reputation of a company does not depend on much else than the respect of the players and their fans. They had a record number of pre-orders and they dared to release a game 1 year too early.
And, if that's your impatience talking, there are plenty of games coming out every week until the next month, its not so far 1 month.