Why is it sometimes necessary to lard or bard meat poultry or game before roasting?

Larding or barding meat, poultry, or game is often necessary to enhance moisture and flavor during roasting. These techniques involve inserting strips of fat (larding) or wrapping the meat in a layer of fat (barding), which helps prevent the meat from drying out in the heat. This is particularly important for lean cuts that lack enough natural fat to stay tender and juicy. Additionally, the added fat can impart rich flavors to the dish as it renders during cooking.