system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar: The Last Airbender/Legend of Korra] How much authority does the Avatar have?

I think we can all agree that the Avatar (a living god) is very much widely respected throughout the world due to their role in maintaining balance as well their predecessors doing noble things like stopping a genocidal Fire Lord from burning the Earth Kingdom to the ground. 

But how much authority do they actually have? On one hand, they’re treated almost like royalty and people will gladly hear them out. However, then there’s Korra, who was (unfairly) kicked out of Republic City by order of President Raiko, despite the fact that she was instrumental in stopping a violent, revolutionary anti-bending terrorist organization as well as saving the entire world from the Avatar universe’s equivalent to what amounts to Satan/the Anti-Christ (who was gonna put the world under 10,000 years of darkness and chaos until the next Harmonic Convergence). This would be like if George Washington came back to life at full health and was of sound mind but then Trump suddenly declared him to be persona non grata.
gpt
The Avatar doesn’t have explicit authority to order any world leaders around, but between their unparalleled bending prowess, the wisdom that they gain during their travels around the world, and their near-universal respect that they have among the general population, it would be foolish for any world leader to ignore them if the Avatar took any kind of stance on an issue. Their word would have a great deal of influence globally, even if they don’t actively intervene in political affairs. Also, if any kind of global crisis occurred, world leaders and civilians alike would be looking to the Avatar to provide guidance and support in dealing with that crisis.