Errrrr. I think there was a transcription error in their interview text. If you read what it entire statement at the end said, it seems the "not" should not be there:
“The last thing is that our aim is to make an MMO,” Yoshida continued, “and a lot of companies do their development for MMOs by getting money from investors. Then the investors want their money back, so if the game doesn’t make enough money or doesn’t have enough users, then what do we do?
“We’d have to pay our investors back, and free-to-play is not an option to get that money back to investors quickly. Final Fantasy XIV: A Realm Reborn is a product that is independent to Square-Enix. All of the money’s coming from us, so we had more time to put it into what we wanted to do. We’re not in a rush to pay anyone back.”
What he's saying here is that other MMOs have investors, and when the game fails to make enough money or drops in userbase, they have to turn to free-to-pay to get money back for investors quickly. But there are no "investors" for FFXIV, and it's entirely funded by S-E, so they don't care if it takes longer to build up a userbase and get returns using a subscription model.
It has to be a typo, or the entire statement makes no sense. :P