Yes. Multiple characters were sexist and clowned on. Katara only learned how to use her powers after a sexist teacher realized his views were wrong. These characters grew up in a society with defined gender roles and these producers expect them to have no brainworms lol. Honestly that type of erasure is damaging imo because it shows that boys and men magically become better instead of evolving through empathy, socializing, and reeducation. Or deprogramming for the liberals who are scared of the word reeducation.