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

[Rosenstrauch]

And a reminder: the Scions didn't know a damn thing about dynamis other than it being the energy of emotions, but once they stepped in Ultima Thule their "expertise" was enough to create bridges and teleporters and even an entire zone. Having a low aetherial density to be able to manipulate it is one thing, having the knowledge of what the hell you're doing is a different story. Apparently it doesn't take that much.

That's actually something I never even thought about. But yeah, from the look of it the only things you need in order to use Dynamis are... knowing it exists and having a low enough aetheric density to affect it. Since they already had the means of Sundering if it was necessary (Venat/Hydaelyn) as well as the knowledge of Meteion's location (again, Venat), all the Ancients would've needed is a means of traveling to Ultima Thule, which probably wouldn't have been too hard to accomplish for them, either.

EDIT: Oh, and they'd probably have to get therapy for Hermes, since he's both the man best suited to dealing with Meteion on a personal level and the one most likely to screw them over if he's involved otherwise. Maybe parley with him. "We won't hurt your daughters and we'll even rethink our policies for concept creation, so please tell them to stop trying to murder us all".