There's a few lifetimes worth of dashcam video on youtube that clearly show (metaphorically speaking, a lot of them are 480p after all) it's often not that simple.
Attributing fault for an accident. Plenty of cases where someone gets hit from behind because they pulled into traffic with too little room to spare or did something other traffic participants could not have reasonably forseen. Yeah there are plenty of people who text message their way into stopped traffic but there's enough edge cases that the generalization falls down.