Why would it not be a good idea to have diverging mirrors on car headlights?

Diverging mirrors on car headlights would spread the light beam too widely, reducing visibility and making it difficult for drivers to see the road ahead clearly. This could also create glare for oncoming drivers, increasing the risk of accidents. Additionally, a focused beam is essential for effectively illuminating specific areas, such as road signs and obstacles, which diverging mirrors would hinder. Overall, maintaining a concentrated light source is crucial for safe nighttime driving.