system
Given the following post, respond as if you're commenting on Reddit:
human
[ATLA] How much of bending power level is innate?

Clearly there are some benders which are innately more powerful than the rest of the world by a large margin. Namely these are the protagonists and villians. Is this to say every bender born comes with a different power level or skill ceiling to their bending ability, or is it a matter of dedication and practice to the martial fighting style? Is there something else at play that determines your innate bending power level like the spirit world?
gpt
Column A column B. Talent is talent. Hard work still matters. Katara is truly gifted as a waterbender. But she's also basically constantly fighting for her life and being forced to learn fast. She has passion and drive to boot.

Toph is true prodigy, arguably as much so as Azula is at firebending (if not moreso). She is a rare talent, one in a million and was able to develop seismic sense through earth bending on her own as well as discover metalbending. She is arguably one of the most powerful benders in the whole series (both).

Zuko is moreso on the other side. He is not naturally talented. He just works hard and still manages to be pretty solid. He's worse than Azula and only 'nearly' defeats her because she had lost her mind at that point. He's certainly good. But lacks almost any natural talent for firebending. However he improves drastically once his inner conflict is gone and he has his drive. So it's arguable that his difficulty and lack of raw talent is in part due to his inner turmoil. This is supported at least a bit by his inability to lightning bend.

Aang is the avatar. He's obviously going to be exceptional.