Just so I understand the point some people are making here about the "necessity" of sundering people to be able to better interact with Dynamis...

You mean to tell me that the Ancients can create a being capable of manipulating Dynamis to that degree, to effect their downfall... but they can't also create other beings to counteract that same thing? You know, create some entelechies with the express purpose to neutralize/destroy Meteion was somehow beyond their capacity?

...really?

Okay, then.

edit: On "genocide". The sundering killed far more people over the ~12000 years, through what became the new "cycle of life", diseases, wars and what have you, then the calamities ever could.

And it's not even close. Given a long enough timeline, the rejoinings are a moral imperative.