And how does that contradict my claim? There is an upper limit to what the human body can survive, and going into a wall with 160kmph (100mph) and claim we can

And how does that contradict my claim? There is an upper limit to what the human body can survive, and going into a wall with 160kmph (100mph) and claim we can survive is a dishonest statement at best. If the car has a 4m long deformation zone the force is around 50g for 0.1 second. That is unrealistic, and 1m is probably more realistic, producing 200g for 0.023s. Neither is clearly survivable. I'm not disputing that we can make very safe vehicles, just look at F1 drivers walking away from 300kmph crashes, but they shed so much energy to tires, tire barriers, gravel and all the other stuff that slow them down.