It's a lot safer if they are flown by AI. Possibly only reverting to manual control in an emergency and then only for a controlled AI assisted landing. For example.
That could prevent the scenario where terrorist with TNT strapped to his belt flies into a buildng.
On the other hand: People could still muck with the hardware and the software. Just making it more difficult doesn't rule it out.
It would completely defy its purpose .
It looks like Level 4/5 automation will never be achieved for cars , the good thing about that is not having to deal with the psychological problems that come with it.
Cars, bikes, motorbikes, boats,jetskis….and jetpacks.
People love them because it makes them feel in control as they are the ones at the wheel
People proposing self-driving or AI driving are defacto arguing for private subway trains