Many of the things that we eat that have “sweet” as part of the flavor profile also have fats as part of ingredients - those are things that cats do taste and recognize.
When one looks at cat treats, the fat component is higher than non-treat cat food.
I strongly suspect that many cats develop an enjoyment of certain textures. Mine is completely uninterested in most greens, but delights in chewing on broccoli.
When one looks at cat treats, the fat component is higher than non-treat cat food.