I think this also comes from a difference in player culture.

There is a noticeable portion of the community, especially seeming from certain other games, that view MMOs as a thing to do - a set of tasks to accomplish. When the decided tasks are done, the game loses its value.

However for many, if not most - FFXIV has, for the longest time settled in the culture as a place to be. When tasks are done, other things are explored, perhaps aiding others in their tasks or discovering things that were left undone or unexplored.

For the later, there's quite a bit of content available, because their scope isn't narrowed by specific task, nor do they ramrod through those tasks in the most efficient manner. Being there is enough in many cases.

The former is far more demanding on the Devs, and I think they focus primarily on the later mentality due to not being able to fill the former's expectations. Limited resources against unlimited desire and all that.