This is a good point, however: Crumple zones can be independent of weight. A lighter car is more able to stop (less energy for brakes to dissipate) or avoid a

This is a good point, however: Crumple zones can be independent of weight. A lighter car is more able to stop (less energy for brakes to dissipate) or avoid a crash (can sustain higher cornering forces, tires being the same).