There are such statistical analysis already, which concluded that there is a reverse relation and association of the car mass and critical injuries including death based on 2 trauma center data with a total sample of more than 1000 patients seen in the emergent room after a car accident. This statistical data includes ANY accident involving injuries to the drivers and/or passengers.
Some want to be the eggs. Some want to be the rocks. Ideally they don't have to crash into each other. But when that happens, well, sorry for the eggs.