What's the point with that quite lackluster story in Endwalker?

[Lauront]

It's the response of administering a spite-driven 'test' that he should know on some level will doom the world and anything else in Meteion's path where I draw the line. Many people can empathise with his frame of mind, but would balk at subjecting the world to irreversible damnation for the sake of some 'test'. Fandaniel (Amon) had the saving grace that I found his antics amusing. He's a sinister clown.

It doesn't really matter how many ways you want to phrase it. If anything, he should already be incarcerated and instead is being allowed to take a position of power because of kept secrets. He cannot do a single thing that is worse than what he has already done. He is no longer needed to solve the problem at hand and is only a perceived hindrance because she allows him to be. And upsetting him is a complete nonstarter of a reason. He is absolutely unimportant compared to the problem at hand.

Imagine not telling world leaders about an alien threat because you're afraid of making the President of France sad. Oh no. But he might be the one person to make a difference. Guess we'll all just die instead. Ridiculous.

At the end of the day, he could cooperate from a prison cell, by force if need be - maybe with a vampire breathing down his neck. :`) Certainly once Zodiark is conceived, but maybe even before.