What a fucking idiot. Handsfree exists for that same use case without holding the phone.
Also where was the "Driver Monitoring System" that was supposed to monitor the driver's attention and their eyes on the road whist operating the vehicle with autopilot on?
I think lots of drivers have become too complacent and relying too heavily on the autopilot system and are still not paying attention when using it.
Maybe if Tesla had put in place a system that properly monitors the eyes of the driver perhaps, the car would slow down by itself and pull over, instead of running past a red traffic light and killing a person.