>>87704500Neither was Korra then. Korra had her parents, Katara, Tenzin and his visits, she knew the people of the South as she didn't want to hurt them when they were kidnapping Unalaaq, she knew Unalaaq and his kids, she knew that Bolin was trying to say that they were together when they first meet, she was able to go to events like the Glacial Spirits' Festival, she wasn't raised in complete isolation.
If anything she had Jinora's upbringing of being stuck on the equivalent of Air Temple Island. And Jinora is perfect as the show tells and shows us. Then again it could be that Jinora was just born without sin so maybe that factors into it.
Toph was raised in isolation, escaping to go learn earthbending and then eventually escaping to go fight in that competition twice.