Khan 95, I think you have either posted this on the wrong thread or have little or no understanding of what military aviation (tactical) is all about.
There is no technical reason why modern airliners could not dispense with flight deck crew in toto. You ride between terminals at a lot of the world's airports on trains without drivers. However, I suggest that Joe Public just isn't ready to ride in the back of an aluminium death tube with no driver...yet. But in most airline scenarios the AP goes in very soon after lift off and might not come out again until after and autoland in near zero viz.
On the other hand in tactical military aviation I was once told that any idiot can be taught to fly an aircraft, but to "operate" one of her Majesty’s fine fighters was a whole different ball game. You are constantly appraising the tactical situation and making decisions. The take off, landing and getting from A to B is about 10% of the job. (45.7% of statistics are made up on the spot!)
True computers have made a huge difference to the working life of a fighter pilot, but having computers to reduce workload does not mean the pilot sits there doing nothing, it means he can now do much more than before or do it "better" than before.
As Soddim points out flying is inherently dangerous, the only way to ensure that accidents don't happen is to keep the hangar doors locked. But here again computers have helped reduce accident rates (GPWS, TCAS depend on computing power to function). High speed computers and FBW flight control systems no allow previously "unflyable" aircraft to fly and reap the benefits in the process.
Here's a thought to ponder; what about an aircraft that features an "auto pull-up", an "auto-recover" and an "auto-eject" capability? An improvement or an intrusion?
T
Just seen Onan's question prior to posting, I believe you will always need a set of eyes, ears and a brain in the cockpit to be able to relate back to the commander on the ground what even the most capable of modern sensors and systems can't appreciate. Intercepting a hijacked airliner is a good example, can you get a UAV to formate in a position such that its camera can see into the flight deck as might have helped in a 9/11 scenario? Not yet.