An in-universe clarification is given within the second episode of The Legend of Korra, ‘A Leaf within the Wind.’ Korra expresses her frustration with airbending and Tenzin explains that, “typically the factor that’s probably the most tough for the Avatar to grasp is the one most reverse to the Avatar’s character.”
From the second she was launched Korra was hotheaded and raring for a combat. She didn’t take “no” for a solution and was extra prone to punch her manner via an issue than discuss it out. It is sensible the opposite parts had been comparatively simple for her whereas airbending, an artwork that focuses on oblique types of fight, didn’t come to her as shortly.
Aang had comparable points when it got here to earthbending because it was in full opposition to his character. Aang wasn’t like Korra, he didn’t sort out issues head-on. Particularly within the first season he typically solved issues with a peaceful air and typically a joke in tow.
This results in the second reply to the principle query we’re discussing, one which made it so Avatar: The Last Airbender and The Legend of Korra wouldn’t be too comparable. Seeing Korra study all the opposite parts, as Aang did in ATLA, would have been repetitive. The reveals inventive employees properly realized that by ageing Korra up from the place Aang began and making her naturally proficient on the three parts he needed to study, they wouldn’t be giving the viewers the identical tales they’d already seen. It will enable them to point out the method of studying air bending, a course of we had seen little of in ATLA.
It additionally helped inform Korra’s character. When crafting the sequel sequence the crew behind it didn’t simply need to repeat ATLA beat for beat. They wished one thing new and the concept of a hotheaded Avatar contrasted properly to what the viewers had seen with Aang.