I would 'guess' that line workers back in the good 'ol days had it pretty rough. Yes, the UAW had some say on what was considered 'dangerous' or labor intensive. Yet, we now know most materials back then (lead paint, asbestos, etc) were very dangerous. Also, consider the quality made by line workers was not really very good. Remember the saying "Don't buy a car made on Monday or Friday"? That said, I agree its much better today with robotic welding/machines, and much better (and stricter UAW/Federal Laws) to ensure workers are safe.