Bre Karn , you are putting words in my mouth that I hadn't spoken about. Let me clarify:
Primordials are WHAT aligns Wyld Concepts with Creation. Creation is UNNATURAL and thus Wyld so Shaped constantly tries to return to natural state, aka Pure Chaos.
Finished, Creation would require no constant tinkering from Primordials to not revert back. Gods whinning about their Purpouse Of Existence and wanting to be Neglectful is also part of that.
So yes, eliminating Primordials is what removes things Anchoring Creation to existence. In similiar vein as Raksha Fake Worlds fall apart when destroyed OR it's creator-Raksha is unwilling to sustain it anymore OR is destroyed.
Primordial War happened before Primordials finished their tinkering so Creation remains dependant on them. Quite similiar to my unfinished product talking.
What is so hard to imagine that finished Creation would require no passive maintenance from Primordials and be capable of "standing on it's own feet"? And gods would only need to exist to do their fucking work?
Primordial's revelance to said Wyld Concepts? As far as Creation is concerned is totally irrelevant. Without Primordial's Will anchoring said Concept with Creation, those concepts and Creation are disaligned.
Why? Because in the wider Wyld ... Creation is neither unique, nor important. It's just Exalted delusions of importance when they were and are just "daggers" in Autochton's metaphorical hands.
Read Infernals splat where it's written about what SWHiLN did when she broke three of her 10,000 spheres.