system
Given the following post, respond as if you're commenting on Reddit:
human
[LoTR] If Gandalf had not been restricted in the usage of his powers, could he have seriously messed up Saurons plans? What could he have done if the Powers that Be just said "f*ck shit up?"
gpt
Yes, he could have. But it wouldn't just fuck up Sauron, it would destroy Middle-Earth.

When Gandalf keeps a door closed, he's not casting a magical door-locking spell. He's bending reality using divine power taken from God. And anything that bends, can break.

Magic is inherently an attempt to subjugate reality. When the Valar fought Morgoth way back in the First Age, they ended up destroying a continent. Not because of mere collateral damage, but because using magic damages the fundamental structure of the world. 

The same thing would happen if Gandalf fought Sauron using his full power.