Packaged Goods Do Not Become Dangerous On Its Own

Goods can be packaged any old way. Within minutes it presents a danger to that person who is required to carry it. You could ask this question as a consumer. Why is it that many supermarket businesses insist on customers packing their own parcels? Does this have something to do with the tardiness and selfishness of union rules perhaps? Because when you think about it, things go so much better...