They'll use up all remaining resources to change the equipment menu so the accessories can be like "Right hand, pinky finger" "Left hand, index finger"
Which I'm sure all of that started as a sarcastic nod to the "Your Brutal and Suppa are on the wrong ears"
Im pretty sure the reason for this was because theres a NQ, +1, and +2 version of the items.
If they didnt specify an ear slot, most jobs best in slots would just be "Use a +2 in one slot and +1 in the other"
By locking it to just 1 ear you cant stack a +2 and +1 together :p
Edit: Actually, the earrings aren't even rare, so you'd be inclined to chase a +2 in both slots even D: