Maybe the next thing is that all bulk freight will also be required to be broken down into 20 kg units as well for the convenience of the loaders.
The fact is that the load to be handled is whatever the customer presents. I quite understand that items of 30 kg etc are heavy but there should be the necessary equipment and staff training on hand to deal with it appropriately, whatever is required. Not just a "can't shan't won't" attitude.