-Each game was short and sweet. You were rewarded well, and it wasn't all that time consuming to play.
-With it being tied into character progression, it seemed less superfluous than Blitzball. Blitz didn't really offer much of value, was tedious to play, and there was pretty much no reason to play it outside of Wakka's Celestial Weapon unlocks.
The meaning of life is to suffer and be miserable. Online is the worst thing to happen to gaming.