Funny, I have another 30-40 years before I'm "dying off or moving to assisted living". Yet, because I work in software engineering and cybersecurity, you'll have to rip my human-driven cars out of my dead hands before I ever use or own a self-driving vehicle.
Don't get me wrong, as another commenter brought up, I hate traffic too, and the annual fatalities from vehicles are obviously a tragedy. Neither of them motivate me to sign away my rights and autonomy to auto manufacturers.
What happens when these companies decide they suddenly don't like you, cancel your subscription, and suddenly you're not allowed to drive, or I suppose rather use, the vehicle you "own"? It will become the same "subscription to life" dystopian nightmare everything else is becoming.
Or how about how these subscriptions will never be what the consumer actually wants? You'll be forced to pay for useless extra features, ever increasing prices, and planned obsolescence until they've squeezed maximum value out of every single person. I mean imagine trying to work with Comcast to get your "car subscription" sorted.
You know else reduces traffic and fatalities? Allowing workers to actually work from home. Driving during COVID was a dream come true. Let's let the commercial real estate market fail as it was primed to.