What's the point with that quite lackluster story in Endwalker?

[EaraGrace]

And yeah this argument has been going for a while but I'll try to recap: the original argument was that if the ancients had known about Meteion and that dynamis was the key for the Final Days they could have solved it but Venat held that info from them. Then someone argued that no, that because neither Emet nor Hythlo ever heard about dynamis and because of their stations that outrules other researchers from existing, so that means only Hermes-senpai was sugoi enough to do it and since he later sat in the Convocation that would have prevented Venat from convincing them of anything, he'd work against her.

So… this description of the argument is inaccurate.

The discussion over dynamis began with this claim.

But the answer is knowledge and creation magic. Elpis's #1 resident depressed edgelord is stated not to be the only one with expertise in Dynamis.

My argument from the start was that this is untrue for the reasons we’ve discussed. Not that he was the only one in the world to know of it, not that eventually they could create something with the ability to control dynamis, but that he was not the only one with expertise in it’s use at that time.

You’ve completely misunderstood what you’re arguing for or against.