The rules are not made for cyclists, and you can see that in their riding. When you expend your own power for every acceleration and have better vision & hearing, a red pedestrian light with nobody using it suddenly looks less absolute. A one-way street that can easily take 5 of you next to each other, and probably nobody even driving there, when the way around is 500m longer - the same.

You can see the same behaviour from car drivers when the rules don't make any sense (as for example in some upcoming countries).