I don't know if you've heard of this rift between cyclists and motorists but it gets pretty heated and intense in urban areas. Typically the people pushing for legislative changes and updates to infrastructure are cyclists. Typically, those cyclists are the militant ones and NOT your "A-to-B style cyclists, just going to and from work with a bike, yeah a bike lane would be nice but whatever"-style cyclists. Many of the militant cyclists hold an attitude similar to parent, which is "yeah I broke the law but fuck the police" which makes it very difficult to enact any change.
I'm talking specifically about the militant cyclists which, like I said, are also the ones attempting to push the cause, enact positive changes, for cyclists.
So.
We can't have MILITANT cyclists(again the ones doing the walking when it comes to updating infrastructure etc.) pervade an attitude that they're above the law because surprise no one will take them seriously and thus no positive changes for cyclists.