If I buy a self-driving car (or one with those capabilities and enable them), I'm willingly giving up control. I've weighed my choices and am making a specific decision.

If I buy a "regular car" and self-driving capabilities take over for me, my control is being taken. Maybe it's justified because my driving has been erratic in a "he must be tired" kind of way so there are some immediate benefits but maybe not.

It comes down to control and choice. Without me being able to decide and turn it on or off, I'm subject to the rules, interpretation, and controls of a black box system that I'm not allowed to understand.