During my daily cycle ride between the station and my London office, I see vehicles crossing red lights in large numbers. I see vehicles speeding over pedestrian crossings. I see pedestrians and cyclists regularly imperilled by woeful disregard by motorists for safety and courtesy. I suggest that any sceptics watch a major London road junction for a few minutes.
I do not approve of lawbreaking by motorists or cyclists. Lawbreaking by cyclists sets back rather than advances the cyclists' cause. But it takes no more than a few moments' observation to see which is more common and which is the greater hazard.