David_Lid,
You're wrong.
It's the number of unknowns that make a system of equations difficult or impossible to solve, not the amount of dimensions. Something that moves in 2D, but you don't know what's going to be in its way, can be impossible to automate.
Aviation is extremely structured compared to anything that moves at ground level in an unprotected environment.
There are only a few cases where pilots saved the day because of malfunctioning computers. 60% of all crashes are still caused by pilots. You have to get your statistics straight, chap!
And yes, I am a pilot...