Can you suggest a parameter that a human can use that the machine could not?
Not a parameter, but a scenario. "Bumbly" cloud ahead. Not a nasty cb, but one that will throw the aircraft around a bit. Two options:
1. fly through it - good for the bean-counter's economics, since minimum flight time.
2. Fly around it - good for not scaring passengers, spilling drinks etc. What is the cost to the company of "I wouldn't fly with x airline again. We had a terrible time; my wife (husband?) was terrified."
Program a computer for that one.