This same poll could be taken regarding Humans driving high powered vehicle on existing streeets.
They currently get into millions of accidents every year. Often accidents are fatal to both drivers and passengers.
Human drivers are often distracted by other humans, baby on board, Wifey giving instructions, missed an exit, looking at cell phone, being tired/sleepy/bored. Fighting with others in the car, worrying about personal events, watching for police, disobeying traffic laws, worrying about other nearby drivers, not slowing for conditions, driving while ill/drunk/medicated/recreational drugs/emotional. Humans cause most of the vehicle accidents around the World currently. Perhaps they should also be labeled as unsuitable to pilot personal transportation....
Would be safer to just ban cars. Everyone walks, rides a bicycle, takes a train, bus, street car or airplane. While these form of transportation are much safer for mile traveled, they also have accidents and are inherently flawed.
Current situation is that a human can always simply drive their car themselves. They will take into consideration their current condition, experience and training to decide whether to drive themselves or to engage any drivers aids.