Computers don't drink or drug, don't have senior moments, aren't bothered by glare, and won't drive recklessly. And their reaction time is a lot faster. When the technology matures, computers will be vastly safer than human drivers.
Resisting autonomous cars on grounds of reliability is like demanding that financial institutions eliminate their modern computer systems and return to manual bookkeeping, because you don't think automation is reliable enough.
certainly modern technology is great and wonderful. But IMO you should not take the human human element out.
We recently had two highly computerized warships damaged at sea, run down by other ships, because, although they had all the modern bells and whistles, they failed to keep a human on watch. They counted on the equipment and basic seamanship took a backseat to the computers. Lives were lost.