Most tradesmen I know haul a trailer with their tools and supplies so that they have the option of unhooking and leaving all that weight behind without unloading the truck. Or, conversely, unhooking at the jobsite so that their workers can keep going while they run for supplies.
Yes, but full-size vans aren’t a popular vehicle outside of passenger and tradesmen applications, unlike pickup trucks. I was only pointing out that North Americans apparently prefer to have a passenger vehicle where 40-50% of the wheelbase is unused useless space.