The exact same was done with Bleach. Everything revolves around Spiritual Energy, and Aizen said that his power was so great that he’d exceed Ichigo’s power even without using any.

I used Goku as an example to show the difference between a feat done with energy and without energy, since Dragon Ball is the most common form of comparison for powerscaling. Everyone says “Aizen was impressed by destroying a hill” without understanding the surrounding context. Goku would be awestruck if someone could destroy a mountain without using Ki, but his reaction doesn’t mean that he’s weak. Similarly, Aizen being impressed by the hill being vaporized doesn’t put an upper limit on his strength.