Even though most of you might know about this type of stuff already, i'm here to make the claim and back it with proof, also, talked to the creator of the page about it, and it seems like my case is in point (i dunno why i'm saying this like i'm pheonix wright trying to solve a case) Quoting DYBAD...
I never saw Metapotence as a power of its own, just the simplest and clearest perspective on the concept of Omnipotence
That's why the page was created
Similarly to how full-power Causality Manipulation is the most rational perspective on this same concept
And also for the people who believe that metapotence is omnipotence but achievable...
Omnipotence cannot be achieved unless the writter makes it happen
Metapotence is a simplified take on the concept of Omnipotence, so it is in the same boat
As to why Omnipotence itself cannot be achieved without the writer's help, I would say it's because Omnipotence is author-level power
Author Authority can reach omnipotence question mark???????
(joke don't murder me pls and thanks)