Nope, it should be law that if an auto manufacturer sells an autonomous driving system that they advertise being able to use while driving distracted then they are liable if someone uses it as advertised and per instructions.
What you wrote is probably an auto manufacturer executive's wet dream.
"You used our autonomous system to drive you home after drinking completely within advertised use and per manufacturer instructions and still got in an accident? Oh well tough shit the driver is liable for everything no matter what™️"