Assume all drivers are idiots until proven otherwise.

This is also a good safety practice for pedestrians (maybe even more than for drivers since when a car collides with a pedestrian they’re more likely to die).

In practice most drivers are not idiots but the defensive practices of going around assuming they are definitelly pay up when you do face and idiot driver and avoid a collision (or, as a pedestrian, getting run over) because your level of being careful was the right one for being faced with an idiot driver.