Any device that is used to measure anything has to go through a calibration process. It could be a radar, clocks, speedometer and even truck scales. The process of calibration is to verify that the thing that is measuring an object has been compared against something similar with a known value.
Loading a truck and trailer can basically be considered an art. Whether you are loading pallets, vessels, equipment, steel, logs or anything else you have to make sure the weight is balanced. If you are just starting out in trucking this can be challenging to get right but it's not impossible.
Scaling trucks has been a part of trucking since the mid-20th century, with weight restrictions going back to the very beginning of the industry before scales existed that could weigh an entire truck. Damage to roads and bridges has always been a concern. Since nobody wants to pay more taxes than necessary, trucks and their loads will continue to be restricted.
Being in the trucking industry means having to travel to areas that you are not familiar with. You have to locate places to park, find fuel, scale loads and more. Having to search for "truck scales near me" is a common query in a drivers search history. Making sure your load is legal so you don't pull through a weigh station overloaded is common task after leaving a shipper with a full truck.
Getting a truck properly loaded and balanced is almost a science in the trucking industry. There are a lot of tools that help drivers understand how much they are hauling and how to adjust the truck and trailer to fit inside the required weight restrictions for gross and axle weights.