When I'm walking with my 8-year-old, we both scramble right the hell out of the street if there's a car anywhere in our vision. Neither of us could care less about a bike somewhere. It sure doesn't feel like we're being irrational.
Well, I think bikers have a lot more incentive not to hit people from a personal damage point of view. I mean they’re about as vulnerable as a pedestrian in a collision. So I think you’re thinking right about the risks.
Not to mention the speeds and mass involved, and visibility that a cyclist has vs a driver (without even starting to consider the vehicles that are popular in the US).