Actually, you're thinking of it backwards:
Ajimu said Medaka could do it, and that she herself couldn't.
So, yea. Bullshit.
~~
I would say that saying it's simply because she is a Not-Equal is rather premature. Maybe it's just her number of abilities. After all, she has more than billions, Hanten has just one. A very special one, but just one that we know of.
And if that was so, saying she is all-powerful is equally just as bullshit, since if she is not above everyone else, then by definition she is not all-powerful.
So, if we take the narrator's words at face value, the inclusion of this demon guy is, well, just plain illogical and if she can blink that guy out easily, just a double-edged sword.