Only if you define hauling 4x8 sheets as the purpose. In my area they're used more for hauling trailers, firewood, trash, and numerous other things that are more flexible in their dimensions.
If that's what they are used for in your area, that's the exception rather than the rule in my experience.
The average truck I see isn't hauling anything around. As I said, they are bought not because of utility, but because of a "lifestyle".