Yeah... the fuel in many GA aircraft is usually inside of a relatively thin rubber bladder inside the wing. It does not self seal. If it leaks, it’s going to ru

Yeah... the fuel in many GA aircraft is usually inside of a relatively thin rubber bladder inside the wing. It does not self seal. If it leaks, it’s going to run down the back of the aircraft and may drain into the cabin. In some aircraft with engines mounted on the rear of the aircraft it can run towards or into the engine. Now, on top of dealing with an emergency that has disabled control surfaces like ailerons and flaps that pass through the inside of the wing, damaged the leading edge which is critical for generating lift, and potentially having a wing come off if you hit a rough patch of air with a damaged spar, the pilot may have to deal with a fuel leak that would endanger the people in the cabin or cause a midair fire. Not good.