Speeding mildly is usually a consequence of stupidly low speed limits. Unless the speeding is bucketed, this alone is enough to skew the results to say motorists are worse than bicyclists. Remember, speeding tickets are a revenue source and the incentive is to set limits that produce revenue.
> The main one cyclists break is riding on the sidewalk - which is because of cars, and it doesn't happen when there is a bike lane
This is still illegal. Blaming it on cars is lame-- these are grown adults willfully ignoring the law because they find it inconvenient.
A motorcycle likewise can ride on the sidewalk to avoid car congestion but it doesn't because it's illegal and we would hold the driver accountable. Bikes, not so much.