even if it's a likely mistranslation, the OP is trying to emphasise a bit too much of how diverse and progressive avatar is.

Don't get me wrong, Avatar is progressive in the greatest of ways; realistic , empowering and subtle, but some of the statements are exaggerated and out of context.

One thing to take note of how great it is at progessive depictions is that in team avatar, there's a person with an obvious IRL disability, and a relative , literal and fictional "lack of ability", and both characters are treated as valuable additions to the team, while showing they are treated as their behaviour and demeanor demands they be treated.

Toph and Sokka. Toph is blind, and takes herself seriously while acknowledging they perceive the world differently. They are worthwhile and valued through their earthbending, but their limitations with lack of sight when putting up posters or needing to read or see into the distance gets shown too.

Sokka is the only Non bender on "team avatar" and is treated like a fool not because he can't element bend, but because he is a fool, but they respect his abilities as a warrior and as a person that can deal with practical issues that the team faces. He is dis-abled because he does not have an element bending ability.