It's like that feeling of power you get from owning a gun that you only bought because you feared all the other people who owned guns.
No, it's really that the ability to move at ease is priceless.
If you add pollution impacts, cars double the yearly deaths of guns.
And in a Cost/Risk/Benefit computation, cars remain incommensurately invaluable. Because one's Quality of Life without them would simply be destroyed, comparatively. The moving "castle" (legal term in the USA) can be more important than the house in crucial regards.
The point attempted at post 48501189 remains unintelligible. That cars imply risks and externalities does not clarify it.