>>34834923I dunno, insects might be seen as humble creatures that are 'close to the earth', but bugs are never mentioned with any importance in-universe. It's not like earthbenders BEND bugs....
...I mean, firebenders don't bend dragons either, (although, how COOL would that be?) but still.
Don't take Fighting too literally. All the bending arts are inspired by martial arts yes, but different kinds. Earthbending is the only one that is strictly physical. Waterbenders are wavy, firebenders are aggressive but hands-off, and airbenders + Fighting type just don't go together.