Why can't men and women play in the same team in a sport?

Men and women are often segregated into separate teams in sports due to a variety of reasons. The primary one is the physical differences; men generally have more muscle mass and physical strength. This can create an uneven playing field in contact or strength-based sports. Additionally, societal norms and traditional views on gender roles often play a part. However, it's worth noting that this is changing, and mixed-gender sports are becoming more common.