Cycling is cheap, often faster than driving (in my city), healthy, less noisy, creates vastly less pollution, less dangerous to pedastrians... And I'd guess that about 95% of drivers that I come across are respectful of the danger they present - overtaking with enough space, and not at too high a speed (my city doesn't have great bike lanes). Unfortunately, a typical journey involves passing more than 20 cars, which…
Unfortunately I see it the other way. Asa rule I give cyclists plenty of space when overtaking, even happily sitting behind a slow cyclist on a 60Mph road for 30 seconds to a minute in order to find a safe passing spot.
However the same courtesy is not paid the other way. When in multi lane traffic jams (or even slow traffic on a single lane road) cyclists will fly down the tiny gaps between the cars, often only just wide enough for their handlebars to fit through. If vehicles at speed need to give such room for an overtake, why doesnt it work the other way around? There are plenty of videos on youtube of bikes going very fast between stationary cars, only to hit a wing mirror and crash.