How is galens theory wrong?

Galens' theory, which posited that bodily humors influenced health and behavior, is considered wrong because it lacks empirical support and fails to account for the complexities of human physiology. Modern medicine recognizes that diseases are caused by pathogens, genetic factors, and environmental influences rather than imbalances of humors. Additionally, advances in medical science, including microbiology and genetics, have provided a more accurate understanding of health and disease mechanisms. Thus, Galen's ideas are seen as outdated and overly simplistic.