Having the scrappy underdogs from humble beginnings fight their way through a situation that they should have no business being in is a method of storytelling and one that can craft a compelling narrative. But I don't think FFXIV espouses "the great man theory" either.
The Great Man Theory is the idea that "exceptional individuals' innate qualities and talents that make them born leaders. It emphasizes individual agency and willpower as the primary causes of historical change, while downplaying the role of contextual factors."
There isn't a lot of evidence that any of the central characters is really the type of "Great Man" ala Napoleon or Julius Caesar that this framework of history espouses. Alphinaud believes himself to be this until the Crystal Braves incident sends his ego crashing down. Even then, he's only effective by befriending others and utilizing their talents to make up for his shortcomings. Nanamo wants to be a just, capable queen, but her blind, somewhat sheltered idealism leads to self-destructive actions that she's forced to confront when she's nearly assassinated and only saved by the manipulations of the man she considered her worst enemy. Lyse is labeled the leader of the Ala Mhigan Resistance for her abilities as a fighter and as a figurehead, but actively admits that she's in over her head when it comes to actual leadership and lacks an innate genius that would let her make effective decisions without consulting more experienced and able people like Raubahn.
The Crystal Exarch would not have made it to the First without the efforts of generations of people before him, including common people like the Namazu of Yanxia. Even as a near philosopher king, he questions himself and prefers to consult the people he governs rather than make so-called genius plays. Some of his plans are outright hare-brained and overly self-sacrificing, as Alisaie, Y'shtola, and Krile rake him over the coals for being so willing to throw himself on the pyre when other options can be reached. Even leaders like Hien and Aymeric who are incredibly effective suffer consequences from their short-sighted decisions, like Hien humoring Gosetsu and thus denying his people closure or Aymeric's rush to separate church and state making the clergy pariahs in their homeland. None of these people are the sort of invincible geniuses that would really justify you labeling FFXIV as a supporter of the Great Man Theory.
Even WoL and the Scions only enact great change with the help of others. Even in Shadowbringers, where they upend an entire world order, is done with the aid of the people whose support they've won through their actions and could not have accomplished otherwise. If the Great Man Theory specifies that these people did great things regardless of contextual factors, then FFXIV argue that these great things could not happen without those contextual factors.
The problem with this is that listing every single soldier of valor would drag down the pacing of the story. Introducing characters just for a throwaway mention doesn't work in an interactive medium when compared to a novel. We do see leaders get injured (see Raubahn getting his arm cut off, Aymeric being stabbed, Alisaie getting slashed by Fordola, and so on. And we do see soldiers of uncommon valor in sidequests. For example, there's an entire questline in The Peaks focusing on a Garlean conscript named Baut who fought tirelessly to improve conditions for those in the occupied Ala Ghiri, to the point that he won the hearts of everyone in the city. When the Eorzean Alliance comes marching in, he tries to smear his own name out of fear that the people would get themselves hurt protecting him should the Eorzean try to prosecute him for being in the Garlean army. His fears are unfounded, but his kindness and willingness to fight his fellow conscripts and his Garlean officers are true.
[/QUOTE]
And you're right. I entered this conversation with a swaggering, condescending attitude because I've generally grown tired of so many threads saying "Scions bad, Garleans and Ascians good" and the mental gymnastic some posters will use to justify their opinions. I apologize for that.
Still, I disagree with your notion that FFXIV is somehow supportive of the Great Man Theory when the heroes repeatedly succeed because of others rather than in spite of others.