First off, just to say that I hate the idea of the compensation culture that is developing. But sometimes people should sue, because they need to.
I knew someone who was in a normal family car that got hit by a rally car exiting a special stage and joining the public roads.
The rally car wasn’t racing at the time just “hurrying” between special stages. The family in the car lost one life and the other three suffered severe injuries. The rally car wasn’t really damaged (but that’s beside the point). In cases like this a law suit is the right thing so that the injured can try to get their lives back on track.