What lore do you ignore?

[Dikatis]

I personally think you're giving Venat too much credit. She was a fighter and a friend, not a genius.

Quick correction. She was Azem and described as a scholar of singular brilliance who uncovered many truths about the star in her travels. So she's very, very smart. But at the same time, it's as you said, there's no way WoL can exposit about everything, much less the the 11970ish years before they were born. We do know that Venat's first measure was to try and mitigate the Final Days' devastation as a whole, but that failed. She only resorted ot Hydaelyn and the Sundering as a last resort.