What is a primary reason attic flies are considered pests?

Attic flies are often regarded as pests primarily due to their irritating presence and the noise they create. Their buzzing can become a significant annoyance, especially in quiet areas of a home, such as an attic. This noise can disturb daily activities and interfere with the comfort of the residents. While other factors, such as potential biting or impacts on food sources, may also pose concerns, the prevalent irritation caused by their buzzing behavior is a standout reason for their classification as pests. Their annoyance level can lead to increased discomfort for homeowners, prompting the need for pest control measures.