There's a clear breakdown of communication caused by what looks like pedantry.
Clearly ffxiv treats its story differently than other mmos do, which is the story lock. A lot of longtime XIV players don't mind and even like this lock because it forces a clear linear chronology. Stormblood comes after Heavensward. I can't jump straight to the First like I can jump straight to Burning Crusade content.
Ffxiv sells itself as a story first. Many consider that to be the definition of "story driven." The story comes first, ergo it drives the game. You can't raid without doing the story. Dungeons and areas are locked behind the story. Crafting and gathering are likewise locked behind the story. It's clear you have a different definition for "story driven."