55mph had absolutely nothing to do with safety. Jimmy Carter ordered that national highway funds be withheld from any state that did not lower their speed limits to 55mph during the gas shortage in the early '70s. It was ostensibly to reduce gas usage in the U.S. I lived through that pathetic farce.
You're wandering into a philosophical argument of whether the function of laws is to protect us from ourselves. Taken down that slippery slope, we've gotten into a place where IMHO far too many of our personal decisions, including private medical decisions, are being made by laws and regulatory agencies, robbing us of much of our freedom to run our own lives. Go down that road and
And that's just plain wrong.
Would you like federal regulators telling you how to brush your teeth? How to wash your back? What toothpaste to use? How you should get your hair cut? If so, you an get that in Russia, Cuba, or North Korea.
IMHO laws should be to protect the prey from the predators. Unfortunately, they've been twisted to in many cases protect the predators from the prey. Criminals seem to have more legal protections than victims.