Honestly? The reasoning is rather simple and easy to understand if you ask me. It's yet another beneficial plot point needlessly attributed to Hydaelyn in Endwalker to further convince us of her righteousness. Just like how in 6.1
the 12 in Aglaia are very likely going to be revealed as further creations of Hydaelyn.


It's actually kinda funny how desperately they're trying to paint over her ever so slightly tarnished reputation.