There is absolutely no reason any road car should be able to (consistently) drive faster than ~150km/h
You’d eliminate all traffic fatalities if you limited cars to 5 mph. We as a society have collectively decided that X number of traffic fatalities are acceptable. It’s the price everyone pays for efficient transportation. Why 150km/h and not 40km/h? Are you too impatient to drive 40km/h even though it could save lives?
No one has accepted anything, certainly not the increasing number of dead pedestrians from ever larger cars. You surely recognize the massive moral hazard.