The problem is that there are no license requirements for bikes, so many riders are totally unaware of the actual laws, and often highly inexperienced..
Drivers at least have to pass a test, and while there are plenty of bad drivers they should at least have some experience and understanding of the rules.
On a daily basis i see bikes ignoring red lights, while to see a car go through on red is pretty rare. Just yesterday i saw a bike come off of a footpath, go directly across a 2 lane road without slowing or checking for vehicles (causing several cars to hit the brakes) and into the wrong end of a one way street.
And it's no better as a pedestrian, i was shouted at by a bike rider who took issue with the fact i was in her way by walking down the sidewalk causing her to hit the brakes. It's illegal to ride there, why should i be forced to get out of the way of a bike speeding down the hill ringing a bell and shouting?
Also when trying to cross a road, you get a group of vehicles which pass you, and then a long spaced out stream of bikes that fill in the gap before the next group of vehicles - giving you no time to cross.