No we don't, and ironically the Final Fantasy series is not stranger to this kind of story:
- Final Fantasy Tactic: Ramza isn't the main character or heroes of the universe, but he helped move the story along. So like ... he's the MC from a gameplay perspective, but not from a narrative perspective.
- Final Fantasy X: Yuna was the central story pillar, although Tidus's story only start weaving in more at the end.
- Final Fantasy XII: probably the best example, Vaan's role as a character is not really relevant to the story, he's just there to show us the story. In any other games he would be an NPC.
You also see it in other games: Dragon Quest V, Xenoblade Chronicle X, Fire Emblem Awakening ..etc..
The main difference between those games and DT is ... they don't have bad writing.
This is why I always says DT shouldn't be excused because it's a new story, WoL taking a back seat or whatever. The problem is not what DT's story is about, or what it is trying to do. The problem is ... it just sucks at whatever it is trying to do.