Yeah, some truckers, and I use the term loosely, think they know how to load material better than someone who loads it every day.
I had a customer years ago the loaded big stamping press dies that weighed 10K to 30K apiece. If the driver wouldn't let him load them where they should go on a trailer, he refused to load him and sent them away. A few years prior to that he let a driver go out loaded too heavy on the trailer axles, against his advice. The driver got pulled over at a weigh station, and detained for a few days until he could get the load moved and pay the overweight fine.
After that it was his way or the highway.