It is a well-known rule of the internet (specifically Rule 34) that if something exists, there is an adult parody of it. Avatar: The Last Airbender is certainly no exception. There are several reasons why creators and fans gravitate toward making adult content based on a children's animated series:
Netflix's high-budget reimagining of the original story, bringing the bending arts into a live-action, visually stunning format. Avatar The Last Cockbender Full Version
The ATLA lifestyle is not about perfection or complete escape. It’s about balance, growth, and finding joy in small elements of life. As Uncle Iroh said: It is a well-known rule of the internet