If a bike rack is really like bull bars (and I think that's unproven) then either ban both or neither. The current situation is absurd.
Secondly, the reduced risk of collision with a vehicle driven by a higher-qualification driver should be factored in, no matter how much some try to pretend it's irrelevant.
And finally, once a vehicle hits a pedestrian (and that's the way round it usually is to cause injury, not what ellendune wrote!) then the pedestrian has basically lost anyway.
There is research that demonstrates that solid bars and harder more concentrated edges like bars (such as are found on bikes when stowed sideways) considerably increase the injuries to pedestrians when there is an impact as they concentrate the loads on smaller areas of the body. Ordinarily a pedestrian has a reasonable chance of survival with impact at 20mph, but with these sorts of things that reduces the chance of survival significantly so the vehicle would have to be going much slower.
Here is an old
article by Christian Woolmar from the independent in 1994
Nothing in that article about bike racks being like bull bars and on second look, there doesn't seem to be anything in your whole message replying to any point I made!
Also, if (and I say it's still unproven) current bike racks are like bull bars, it's surely not beyond the wit of man to invent a bike rack with a pedestrian protection panel on its front. Airbags, even. Short-haul buses are hardly as streamlined as trains to begin with.