The Reasoning behind The Sundering? (*6.0 Endwalker Spoilers*)

[Jandor]

I still don't get why Venat thought not telling the Convocation or her followers about Meteion or about Dynamis was a good idea.

Hermes was nuts and Lahabrea ain't looking super sane so far, 50% of the Convocation that we know about had a few screws loose.

I think people seriously overestimate how resilient the Ancients were. Hermes was already spiralling a bit from having to put rabid dogs down, he totally flipped when his experiment didn't pan out how he hoped, and no-one seemed to pick up on how unstable he was and he was made a member of the governing body of their society.

And if we go with the whole 'Hermes wasn't the only person who could make Meteia/knows about dynamis' thing, then any Ancient that doesn't take the news too well could potentially start making the problem worse.