Who needs human pilots in airplanes? Computers will do just fine on their own!

[Sacred Jellybean]

I suppose that's true but couldn't there be a manual override system? Everyone is still required a license, is expected to be able to drive manually at a moment's notice. If a system is hacked, the driver can pull a lever or whatever to switch to driving it themselves. There are protections for these sorts of things, I reckon.