Gastronomy is the "higher" cuisine, the art of enjoying the taste of eating and drinking.
When preparing gourmet meals, attention is paid especially to the quality of the ingredients. In terms of quality, freshness can be important (eg nothing from canned goods), but especially the origin (pastas should come from Italy, beef from a particular mountain region, wine from the Bordeaux region or rather from that chateau, because that is exactly the right combination with the prepared food). Everything to optimize the taste.
The preparation of food in this way means that restaurants that prepare food in this way are extra pricey. Most restaurants work with taste profiles. They adapt the wine to the food so that you can taste both the food and the drink.