Originally Posted by
Jemachu
Honestly I think the third set of sacrifices are a moot point come Endwalker, as we know now that the point of contention was purely ideological.
Venat was clearly scared of humanity following the path of the Plenty and believed they needed to embrace suffering and hardship. This is no doubt affected by the fact she met the WoL, where the sundered are largely forced to accept living with suffering and strife, even though this is because their only other option is death. She came to the conclusion that the ancients, who had the ability to ultimately escape their newfound situation through both their own power and Zodiark and would over time return to their previous idyllic world, had failed the test set by Hermes and passed her judgement. The test which only she knew was taking place, the test which only she knew the cause of.
Would they have been able to have the resolve to defeat Meteion and find a way to do so in the future, had they known the cause? Most likely, considering how powerful the ancients and especially the members of the convocation were. However it is clear that Venat's issue lie within the ancient way of life itself and where she believed they were headed. She took it upon herself to be the one to pass judgement, which is what I believe to be her failing.