Actually it does. If you assume that doing some a difficult dangerous task like, testing a rocket engine, building a building sized rocket or launching a rocket is inherently dangerous, and no amount of safety will get the injury rate to 0.
So if a company only does 5 engine test and 1 launch a year and has 10 injuries, then that is inherently worse then a company that does 1000 engine tests and 100 launches but has 20 injuries.
So if a company only does 5 engine test and 1 launch a year and has 10 injuries, then that is inherently worse then a company that does 1000 engine tests and 100 launches but has 20 injuries.
Or do you disagree?