Doesn't seem like the person you're responding to is talking about vehicles "hauling crops" - rather, the lifted "rolling coal" vehicles that have been an integral part of rural masculine culture for some time now.
Anecdotally, I haven’t seen a diesel that dumps soot in a long time. It would seem the kids with deleted emissions systems and smoke tunes have given up near me. Sorry this small group has affected your perception of the proper use case and larger group.
Can you provide any kind of source on the "proper use case" and "the larger group"? It would be nice to have something to reference other than your personal anecdotes :^)