Venat's faction wasn't making a case for fatalism, and just sitting down to die. Her stance was about having the resilience to move forward in the face of suffering while having the determination to seek out sustainable solutions for the long term. Trying to bring back the souls that were sacrificed to Zodiark by sacrificing the souls of yet others does nothing to advance a solution out of the stalemate, especially when we know that Zodiark is only a temporary countermeasure. There are plenty of short-sighted, hedonistic things that you can do to make your quality of life better in the present, but that doesn't mean that it will last forever.

Likewise, the survivors of the Eighth Umbral Calamity didn't erase their suffering. They suffered tremendously, but they survived. And they took steps for themselves to build a better future under the guidance of Midgardsormr. Again, resilience.

I always find it odd when someone uses the term 'platitude' as a rhetorical tool to make a point sound less valid. They're platitudes because they are truths that are so blatantly self-evident to most people and so often repeated that you're bored of hearing them. It's a bit like conceding that your views go against common sense.