Loading and unloading of machines is an operation that requires the utmost attention from an operator. There’s high risk of industrial injury in these operations. Parts can be hot, heavy, with sharp edges. At the same time operators can be distracted while talking, they loose concentration by the end of the working day, they need rest from time to time. They cannot work with no breaks.
Thus it will be quite logical to ‘delegate’ all the loading and unloading operations to robots.