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

[Kyohei]

EDIT: There is something sort of darkly hilarious about Venat's rationale about dynamis and one's chances against Meteion, since they have her state she's heard of dynamis but is certainly no expert - and is certainly no expert on the finer points of Meteion's design, either. Self-assured indeed!

Sorry I keep quoting you but it's because you keep bringing up points I thought about in some ways.
Letting alone her not telling the story of everything that happened because of whatever she thought were good reasons not to. Why exactly did she not instil the idea of researching dynamis? She didn't have to explain everything to do that. She's again, one of the most experienced ancient, she travelled the world many times, was a former Convocation member, contributed thoroughly to creation studies and whatnot. If Hermes could find about another energy, in all honesty she could've as well.
Of course we know she didn't find it herself, but in the eyes of ancients who regarded her with admiration she's the kind of person that could very well find unexpected thing such as this.
So, what exactly stopped her from launching the idea of dynamis and make ancients all over the world research it? Or at least those interested in the subject, which I am sure would be many considering how eager they were to learn new things.

Oh, yes we know what stopped it actually.
The lack of preparation writers had about this whole subject pulled out of pretty much nowhere. It really can't be helped, if you create a plot device (dynamis) to explain another plot device (sundering) and another (why Venat/Hydaelyn is the best ever!) and so on, the overall plot becomes filled with holes repaired with bandaids.

Also, I do believe Endwalker suffered double "chosen one" syndrome as well.
The first one being Venat who of course was the only one able to save her planet, her alone had to decide for it to be successful other peasants couldn't so why bother telling too much.
Other one being Hermes, who thought himself the only one able to turn the flower black and also decided to judge whether mankind was fit to exist or not. That being said, it was kind of his job to evaluate things, so we can see it as an occupational hazard (coupled with other issues already brought up).