Those damned driving lights are damned dangerous. If you have ever driven in the fog you would know. Hell you can't pull off the road and idle without worrying that some A hole will run over you assuming that you must be on the road.
And for the light on bull on my bike more bullsh@t. I used to ride a Honda......now that I ride a vintage Triumph and look the part when I ride drivers pay more attention. Just because the headlight on is the law does not mean that it works. Old bikes that were made before the law simply do not have enought generating capacity at idle to keep the main lights on. I sure would not want to be driving a vintage car with the lights on all the time too especially when running defrosters and wipers.