Computers are only as good as their programming, and several possiblr crashes have been averted in the past because the aircrew were able to spot things that they hadn't been trained for and work out a solution on the fly.
That has from memory included doing things that went against what would normally be acceptable, not to mention the number of times aircrew have averted an accident because they've realised that one of the instruments feeding them (and the computers) was at fault.
As examples how many autopilots are programmed to find an out of service airfrield, do a visual approach and landing when the engines have all run out of fuel?
A situation that was thought to be impossible before it happened, but the pilot of the jet had fortunately got a lot of experience in gliders and was able to combine his knowledge of the aircraft, knowledge of gliders and history of the area he was flying over to work out how to get a passenger jet down relatively safely (IIRC they managed to repair it enough that it flew on to a functioning airport within a week).
At the moment the situation with the Pilots AND a good modern autopilot is about the best you can get, and will likely remain so for a very long time as humans are almost always going to do better in unexpected situations that haven't occurred before than the computer (for one thing humans can make use of their own senses if an engineer has forgotten to uncover one of the instruments).