Simple point, but quite pertinent, my car senses an obstruction ahead and will take control of steering and braking in order  to
avoid collision, why is it not possible for a plane to sense the ground approaching at 180mph ?
if one malfunctioning rogue  system puts the plane in a  catastrophic dive, the overriding rescue system  should cancel it and
return the plane to a level flight at the require altitude.
Christ, we are still light years away from the technology on Star Trek and a thinking  Hal 9000 computer.
PS. One for the 9/11 tinfoil hatters,  Interesting the small crater, lack of huge bits of wreckage and bodies at the Ethiopian crash site,
the deniers made such a fuss  about this at the time of 9/11 when Flight 93 crashed in rural Pennsylvania, they doubted a full sized airliner
could crash  and produce such a small crater and evidence a paltry amount of wreckage.