Yea these vehicles are more prominent in North America. Again, people don’t always use them as they are intended.
It seems like your implying there is no need for a 2500HD whatsoever and that everything can be handled with a light duty vehicle. If not, then I’m not exactly sure what point your trying to make. People who use these vehicles with there intended purpose are going to be seen in use with their intended purpose.
Also keep in mind that just because YOU don’t see one with a load, doesn’t mean the owner doesn’t have a good reason for having one. If a light duty van or truck is getting along just fine. It’s probably being used for light duty tasks. But if you use a light duty to haul say a fully loaded 3 car trailer or move large farm equipment, your going to completely ruin the vehicle.