> A bullet has more kinetic energy because it's significantly faster than a bike
that's part of the problem.
The bullet is also shaped to cause damages
If the same 50 grams were a disc of few microns of thickness and a diameter of 50 cm, they would be much less dangerous.
A bike is shaped like a battering ram, an Ami has to pass very rigorous safety tests and is shaped to cause the less damage possible on impact, because it's the law.
So a bike going 20mph is more dangerous than an Ami going 25mph.
Because the Ami has a real braking system and it's possible to maneuver it out of the danger zone at the same time. A bike is much harder to handle in emergency situations, because, you know, the aforementioned gyroscope effect does not work as flawlessly as having 4 stable wheels on the ground.
Good news is that when a biker does some stupid shit, they can blame cars.
Except that when a bike hits a pedestrian it usually causes
grave damages, ask my cousin, who got a broken hip from a bike riding on the pavement.
> All the traffic rules had to be created just because how dangerous and deadly cars are.
That's like saying that rules around train safety were created after trains were invented.
No sh*t Sherlock!
Bike safety rules existed before, because bikes existed already.