Agree that @Frilly_Heck and @puzzlegal have a good metaphor there. Which probably does not originate with either of them.
Compared to most people who do not live in downtown DC or on Manhattan, I do a LOT of pedestrianing. And have my whole life. In many places, familiar and otherwise.
It is totally a given to me that most of the USA is not built for pedestrians foremost; it’s cars first, pedestrians maybe … barely. At the same time, in any car / pedestrian interaction, I have all the disadvantages and they have all the advantages. They can kill or cripple me totally inadvertently with zero malice or even awareness. That’s simply built into the situation with no blame attaching to the specific individual.
Living life as a ped is not the same as living life as a car driver. Motorcyclists are somewhere in the middle. As between any of the three flavors, the situation is not symmetrical.
As a ped, I can look at a car and sometimes make an assessment of how careful / clueful that driver is or isn’t. But the truth is that I can readily identify the worst few percent, but the entire rest of the continuum, encompassing 95% of the drivers at large, look just fine until their bumper is crushing my hip. So I must operate defensively against entities showing zero sign of malice and zero sign of incompetence / indifference. I’m just playing the odds versus the clueless foks hiding amongst the regular ones.
As noted in many threads by many posters, this leads to things like a driver trying to be courteous by waving the ped across in front of them. Nope, I refuse your courtesy and insist you proceed first so I can pass unattackably behind you. I don’t necessarily doubt your motives, but I utterly doubt your competence. And must do so if I hope to live to be elderly w all intact limbs.
In a sense, @Der_Trihs is right that ordinary drivers aren’t nearly as deadly as your alcoholic uncle, your step-parent when you’re a minor, or your wacky neighbor with a gun fetish. So choosing to treat random drivers defensively is not attacking the biggest snake. But it is attacking the most ubiquitous snake. And the law of large numbers says that behavior will be rewarded in a statistical sense by reduced harm.
For sure women ought to be even more concerned about uncles, step-parents, and ex-boyfriends. The risk whose name you know, in addition to the risk whose name you do not.