Yes, shooting any aerial vehicle in third person is just extremely dumb and useless. As it stands there is streamer overlays to create your own first person crosshair. KOTH players used it a lot when the pawnee crosshair was removed, before Arma added the reticle on the glass. The plane has no ability to rutter and aim onto a target, so you need to physically be in a near perfect lineup to kill someone. A first person crosshair would help make subtle adjustments from afar, but it would still require a lot of skill to keep it on target.