Originally Posted by
John E
I disagree, in the sense that higher speed makes any collision more disastrous for those involved. Relative speeds between motor vehicles and bicycles also govern how suddenly a cyclist appears to a motorist, how much time a motorist has to react to the presence of a cyclist (or vice-versa), and the cyclist's ability to take the lane safely when necessary.
Well then, the simple fix/solution is to prohibit traveling on the highway by any device not capable of cruising at the "safe" speed. I doubt that is what you are advocating but it is the obvious conclusion to draw from your reasoning above.