Endwalker's message (spoilers!)

[crimsonwitch]

Endwalker follows through on that by confirming that Venat was far too hasty to pull the trigger and never gave her people a fair chance due to being an unhinged saboteur and abusive mother figure with delusions of godhood. In the end, as Meteion confirms, the answer to Hermes' question lay on the Star all along. We know the Ancients were capable of friendship and exploration, so nothing the Sundered did is anything that the Ancients themselves could not have done had they been given the possibility.

I rather suspect that Venat being very pretty will also factor into the eagerness for many to rush to defend her, though. Much in the same way as how Meteion has her hand held because she took the form of a little girl...whereas many of the male antagonists, no matter how sympathetic, simply end up getting a stoic nod or frown. Funny, that!

Not understanding your point.. What did you expect her to do? Expose Hermes in front of Emet and Hythlodaeus who lost their memories ? Tell all of the ancients that Hermes created a monstrosity that is now far away in the galaxy?
I think the ancients might've thought she lost her mind and needed to return to the earth then. EVEN back then dynamis(the emotional aether) was a concept they didn't know much about. They wouldn't have believed Meteion was brewing a storm far far away to end the world.