And she could just as easily do that to a car. Hence why I say you are generalizing. IMHO
I stopped to render aid adn she kept saying she looked into her mirrors and did not see him. Two points:
1. A car, truck, or suv is easier to see, it is bigger.
2. If in this case a tahao runs up the side of my jeep cherokee at 30 mph I have an excellent chance of little or no injury. There is nothing between you and them on a motorcycle.