A bike will hit you with considerably less energy and have considerably less inertia than a car. If you can’t see why that would be advantageous, I’d suggest you go back to school then to learn more about physics
The bike can slow down and stop quicker and is likely to be going slower at the point of impact. Likewise the bike is considerably less ‘solid’ than a car, its parts and riders are all on leavers which move and deflect the forces on impact.
It’s rider and the pedestrian are likely to have better visibility of each other and avoid each other altogether.