You clearly are not a truck driver. If you haul a reefer trailer and need a back haul, you will haul whatever fits in your trailer whether it needs refrigeration or not.
4 pallets…count them.
Apple doesn’t decide what trucks move their products and whether or not they are reefers. They probably have a freight broker deal with that or they have contracts with Swift, JB Hunt, Schneider, etc who decide. If they need a load moved and the closest empty truck is a reefer the reefer gets the load regardless of whether the load needs refrigeration. And wtf makes anyone so sure that freight is Apple products anyhow?