Look up the history and origin of making gravy and sauces … modern gravies and sauces were started and developed in the Middle Ages for beef and meat dishes to mask the taste of rotten or semi rotten food.
Yes I know there are other sauces and gravies for vegetables … but the little dish of gravy for your roast beef supper was started because someone just wanted their food to taste less like a rotting carcass because they had no refrigeration back then.