The nature of aviation, where unplanned problems result in unplanned non-optional landings in random locations (instead of just pulling off the side of the road), would rapidly turn aviation into the most dangerous transport mode. Aviation would soon become unsustainable, and available to no one.
How does making it less safe help anything? (note that I'm not discussing the FAA's massive inefficiencies, many of which I'm sure could be improved without compromising safety)