In my experience, soccer players often deal with bad knees due to the nature of the sport. The constant twisting, turning, and sudden changes in direction can be hard on the knees, leading to wear and tear over time. Also, the impact from jumping and landing, as well as collisions with other players, can result in injuries. And let's not forget that playing on hard surfaces can exacerbate these issues. It's crucial for players to ensure they're taking care of their knees to keep them healthy and game-ready.