When the Autopilot software is disabled, what about the Autopilot hardware makes the car any safer? What is the accident statistic for Teslas not equipped with

When the Autopilot software is disabled, what about the Autopilot hardware makes the car any safer? What is the accident statistic for Teslas not equipped with Autopilot hardware? If Autopilot enabled cars are so much safer than human drivers, can they pass a written and road side driver's license test?