Don't you think there are way too many Characters that lost their memories?
It is an overused story telling device and especially in FFXIV.

"I woke up in Eorzea, but i can't remember where i came from or how i got here, Adventurer can you herp me?"

This is also an overused trope at this point in many many games.

wink wink
https://www.youtube.com/watch?v=N5Xa0ACKaNo