Computers are not infallible and any statement touting digital perfection is hubris.
Humans are not infallible and any statement touting human perfection is hubris.
In my experience computers can perfectly repeat boring tasks... It has been shown that computers are better at counting cells in microscopic samples than human analysts. But don't ask a computer to do anything outside its area of programming...
Humans are more adaptive and capable of taking action in situations they have not met in training. Quite often they are capable of saving the day... sometimes they mess up a perfectly salvageable situation. (Being distracted enough to cruise past TOD.
)
The more engineers make flying routine, the less need for pilots in the cockpit. The UAV observation is: the plane can be smaller if there is no need for a cockpit. Which allows development of an "unmanned small plane" niche. Utility planes for areal photography and surveillance with payloads of 50 kg or less. Technology might grow to unmanned mail-runners, replacing the piloted Cessna's that do that job now. It will take 20-30 years to see those appear on the market though.