In my opinion you don’t need a panner if you’re using the camera strictly to scout where you’re dropping the camera, giving the cord a spin to see what’s around the hole, then move on to the next hole to repeat.
But if you’re going to fish with the camera in a hole for an extended period of time a panner is a must have in my opinion as it simplifies aiming the camera and holding it at a precise depth while freeing up your hands to fish instead of hold a cord.