As a motorcyclist, I've contended with the SMIDSY syndrome many times.
I am never going to excuse those car drivers who are in such a hurry to get wherever they're late to, that they choose not to actually LOOK for what's coming down the road.
I think they look just hard enough for anything that might hurt them ( like another car, truck, etc. ) and if that is not apparent, they pull out....
They don't see because they don't look.