What, and Korra didn't?
Remember when Aang came back and gave her her bending back? Remember when she spontaneously learned to airbend because her TWUE WUV was in danger?
Remember when she lost the Avatar Spirit but turned into a giant just by meditating under a tree? Remember when Jinora suddenly just turned into Jesus with no foreshadowing and gave her another power boost?
Remember when she beat Amon by pure luck? Remember when she left two dangerous portals open just because and that just so happened to bring airbending back?