Deformation zones are designed to protect the car's occupants in the event of a collision with a tree. They are not designed to protect a pedestrian. (Although some modern cars are beginning to have proximity sensors that can launch an automatic emergency brake. That would help the pedestrian. The deformation zone certainly doesn't.)
None of which is meant to imply that being hit by a speeding bike is harmless, of course.
> Deformation zones are designed to protect the car's occupants in the event of a collision with a tree. They are not designed to protect a pedestrian.
Nonsense, all modern cars have deformation zones specifically for protecting pedestrians during collisions. All modern crash tests by EuroNCAP etc. have tests for such impacts and current results speak volumes for the improvements in this area.
None of which is meant to imply that being hit by a speeding bike is harmless, of course.