You can program a computer for every conceivable problem, and combination thereof. Then a problem occurs that no-one conceived of and the computer has no answer, what then? You need a human with the experience to solve the problem there and then
The Sioux City, Iowa DC10? As I remember it McDonnell Douglas never envisaged all 5 hydraulic systems failing.
And the computer to fail safe and help out when required
I dare say Sully was grateful for that aspect when gliding down to the Hudson.
It goes to show there are good reasons for having both computers AND pilots on an airliner, but I would like the pilot to have the final say.