It isn't being listed as a manipulation of aspects, but strictly the erasure of said aspects. It's why Classic/Modern Sonic, Shadow, etc. have their resistances listed as "Resistance to [X] Erasure, [Y] Erasure, and [Z] Erasure" and not resistance to the abilities as a whole.
Most beings who ERASE (like proper EE) a cosmology can be granted erasure hax for the realms they are erasing. It has a set precedent on pages as well; the Time Eater, that one guy from Dragon Ball Heroes, and other cosmology-erasers that I can't name off the top of my head.
What you're quoting is a standard related to cosmology busting through sheer AP (or characters who physically exist in a higher dimension of reality, like Marvel's Eternity). Destroying a Conceptual realm with AP is at best a combination of Range, AP, & NPI, but wouldn't grant Concept Hax. But with a character using EE on said realm, it would net Conceptual Erasure (assuming it wasn't a chain reaction, that it was done through their own power, yadda yadda).
And in doing so he almost gets Sage and Belle killed all while they were in an environment that he had no reason to assume was safe especially since they literally ran into a hostile Metal Sonic in the previous issue and yet they all assumed that the cave doesn't have additional entrances when it is clearly modified.
