With that level of violence it is the same scenario and the same outcome for a car.
If we insist that cyclists protect themselves against multiple tonnes of kinetic energy impact, we should insist on the same protection for car drivers.
We already do. Crash safety standards, seatbelts, and mandatory air bags dramatically decrease injury and death in crashes, and numerous other safety mandates reduce the chance of a crash in the first place.
If we insist that cyclists protect themselves against multiple tonnes of kinetic energy impact, we should insist on the same protection for car drivers.