Yeah, there's a massive difference between a system that can handle a specific number of well-defined situations, and a system that can handle everything.

I don't know what the current state of self-driving cars is. Do they already understand the difference between a plastic bag blowing onto the street, and a football rolling onto the street? Because that's a massive difference, and understanding that is surprisingly hard. And even if you program them to recognize the ball, what if it's a different toy?