This is an inaccurate statement: "This is what bicyclists do, all the time." If cyclists rode the wrong way on sidewalks all the time, they'd never cross a street, and thus, never get to their destination.
I can't tell you if cyclists generally obey none of the rules. I do believe they seldom exceed the speed limit. I also believe they tend to be on their phones and texting much less than motorists.
However, if we look at the consequences of not following the law, what is the ratio motorists/pedestrians killed by cyclists not following the law vs. cyclists/pedestrians killed by motorists not following the law? I would say deaths from motorists vs cyclists is 100:1. 
Why are you more concerned with cyclists who I agree ignore many laws instead of he deaths from motorists who do not follow the law?