Are you talking about technical excellence, or that ephemeral "something" you can't quite put your finger on?
Technical excellence can absolutely be learned. The other is innate. Some folks call it "love." I think that has something to do with it, but not everything.
My mom came from a family of four sisters. They grew up on a farm, and all of them were technically excellent cooks. However only my mom and Aunt Eleanor consistently prepared food that we were all excited to eat. And they ALWAYS served that kind of food. My Aunt Elsie loved to cook and bake, and her food was always edible, but never WONderful.
So I'd say there is something that can't be taught.
Wine is the food that completes the meal.