Hypothetical question: Would training cyclists be necessary in a motor free world?

The following is totally uneducated brain squirrel stuff (but you asked for views):
Motorised vehicles cause the most death and injury on our roads.
But in some ways it seems like people (pedestrians) are very vulnerable to injury from cyclists - like I feel if I were to hit a person standing/walking, I'm hitting them high in the body or at head height and they go over in a way that's likely to lead to severe head injury. A car, even though it has so much more weight/momentum, I kind of imagine people go over the bonnet instead leading to leg and spine injuries.
Combine with the stealth factor - people less likely to see/hear cyclists approaching. Combine with feeling less at risk - people take more risks with cyclists/bikes than cars/big things.
Training cyclists would become more like training HGV drivers now - to make them aware of the more vulnerable road/space user, and take more responsibility for them. Less about how to avoid injury to themselves, more about avoiding injury to others.