Revelations from Patch 7.3: The Promise of Tomorrow

[Thighland]

Ardbert being an Azem shard does not come up, and does not affect his story (in fact I'd argue that it made it worse in retrospect, but that's my general dislike of 'destined heroes' at play).

So it's not really that Ardbert being an Azem shard doesn't matter, it's just that you don't like the trope of the 'destined hero', and you don't want to look at Ardbert that way.
I can understand why someone would dislike it, but if one is looking for a story without this trope, then ffxiv would definitely and 100% be the wrong place for it; and it always has been.

I don't theorize and predict stories; that's just not something I like doing, especially baselessly.

That is fine.
But if you don't like theorizing and predicting, then why are you engaging with people who enjoy doing it?
It feels like you're trying to convince others to conform to your way of engaging with the story, or you're looking down on theorizers in general.