That would be true only if the use cases were the same. The US is very different in terms of both geography and infrastructure than most of the developed world.
How many European farmers are pulling a trailer 150 miles each way to pick up a load of hay? That's a relatively regular occurrence for my family. That sort of thing isn't at all uncommon in the US.
Streets are narrower in many parts of Europe as well, which means a larger truck isn't practical as a sole vehicle.
