The data addresses this in part, to quote my original comment > In every borough there were > 10x the number of pedestrian fatalities from crashes with motor v

The data addresses this in part, to quote my original comment > In every borough there were > 10x the number of pedestrian fatalities from crashes with motor vehicles as crashes with bicycles. It doesn't break down Manhattan into pieces. Or it does, but there's a rather baffling omission of a "Between Motorized and Pedestrians" table. Still, considering that in all of Manhattan there was a single pedestrian killed by bicycle, we can be pretty sure that cars are the greater threat in every precinct. I don't doubt that cyclists could do better, and they certainly present some risk, but I think you're greatly underestimating the risk that cars present.