Another notion is that they were created during World War II when steel was short. Cast iron skillets with enamel were produced as an alternative, making them weigh less than typical pans and pots during those days.
Bacon Press: A cast iron bacon press is a heavy, flat weight with a handle, designed to be placed on top of bacon strips or other meats as they cook. It helps to prevent curling and ensures even cooking by applying consistent pressure to the meat.