Why would a farmer call a Daisy growing in his hay-field a weed?

A farmer might call a daisy growing in his hayfield a weed because it competes with the desired hay crops for nutrients, water, and sunlight, potentially reducing overall yield. Additionally, daisies could interfere with the hay harvesting process and affect the quality of the hay. In agricultural terms, weeds are often defined as any unwanted plants that disrupt farming operations, regardless of their aesthetic value.