Could yoe have stopped the war?

Okay so I'm rewatching avatar and I came to the part where aang runs away at the beginning of book 3, he's lost in the sea and the appears.

The moon spirit, and she gives him a pep talk together with Roku (wonder if they could see eachother) and then the helps aang by enhancing his water bending.

In other words yue can boost water bending and maybe even bend herself. So could she have ended the war herself or helped end it by boosting water benders?

It wouldn't be wrong either because the world was in a state of imbalance and yes the avatar keeps that balance but I don't think there's a bad consequence to someone else solving one of the avatars problems.

At most it'd be that people wouldn't thank the avatar as much and maybe switch to moon praying but is that really worse than ozai potentially winning the war?