For certain interpretations of "intervene", that's true now. See this video of a Tesla hitting a construction barrier.[1] This is a dashcam view from a car behind the Tesla. At 00:21, it's too early for the vehicle to start turning, and at 00:22, the vehicle has already hit the barrier. The driver has to detect the failure and then take over. Much of the driver's allowed reaction time is taken up by having to wait until it's almost too late. Control handoff inherently implies a slower reaction time than manual driving.
(Not noticing the lane change warning and orange construction 45MPH speed limit sign back at 00:05 didn't help, either.)
This is the problem with shared control, and why Waymo rejected it early on.
(By the way, the driver with the dashcam is driving terribly.)
>I'll be shocked if it's not next year at the latest that having having a human intervene will decrease safety (22:32)
Like how we got rid of elevator operators because automatic is safer.
>with a full self-driving car computer the rate of improvement is exponential (24:26)
>Tesla is vastly ahead of everyone (30:11)