No one said they don't, and I'd agree with that. I think the whole law-abiding nature (or lack thereof) is a bit of a red herring when talking about this sort of thing. It's really just inattentiveness that causes drivers to hit cyclists, and a lack of awareness of cyclists in general. If a driver is about to make a right turn, he's often not thinking that a cyclist could be coming up on his right, from behind, so he doesn't even look there. That sort of thing is the real problem that needs to be fixed.