Walk around any city centre and look at the sheer mass of street furniture that has been damaged by motor vehicles. Bent lamp posts, dented crash barriers, shattered bollards and so on. Over the course of my life I must have chanced upon perhaps half a dozen buildings with cars sticking out of them.
On another thread on the forum, somebody pointed out that there are 1900 road deaths a year in the uk. When you look into them in more detail, there are about 1300 deaths of motor vehicle occupants/drivers and 600 deaths of pedestrians/cyclists.
Obviously it's irresponsible to put anybody at risk if you can help it, but even in the context of CAPS deployments over populated areas, as aviators we are vastly more likely to kill ourselves and our passengers than any non-participants.