Humans aren't exactly endowed with innate senses of the proportion of the metal death-beetles we encase ourselves in now-a-days.
I mean. You got like three mirrors to see the rest of your car; that's it. And they don't even cover all of it. And even if they did, we're also not that great at innately translating a distorted and cut-up mirrored image of our surrounding metal beetle into an actual mental map, enough to know the end-bits are at all times.
we're not even that good at our *own* bodies end-bits being in the places we think they are, not 100% of the time; and we've only been pilotting THOSE around for a couple hundred million years, give or take. (couple dozen million for the vague shape we got now, even) The death-beetles having been around for the eons that is... About a hundred years.
T' be fair you don't need to know precisely where things are around your car at all times, just a general idea that there's some asshat going what seems like a thousand miles an hour coming up on your left, there's someone else tailgating you despite you going 5 over, and you're trying to avoid that idiot cyclist on your right who is wearing black at night.
People are fucking stupid, your basic goal when driving is to anticipate just how fucking stupid they're going to be.
People seem to be very good at anticipating when I'm being fucking stupid.As fer Joshua's issue, he did the sensible thing, just forgot to check his mirror. Cars have bumpers, the person behind him was alright, nobody got smooshed to a thin red paste. Success.