I'm not saying the technology can't work. I just have a hard time putting my life in the hands of something other than myself. If the technology takes off and proves itself to be a better solution, then I'll support it. I just tend to lean on the side of caution. If I'm going to die, I'd rather it be my own fault than the fault of some computer error.
The side of caution would be not to trust humans to operate fast-moving wheeled death machines in the first place.