What is the main purpose of wearing a helmet while riding a motorcycle?

Wearing a helmet is primarily focused on safety, specifically on reducing the risk of head injury in the event of an accident. Helmets are designed to absorb impact energy and protect the skull and brain from serious injuries. The cushioning and hard outer shell work together to mitigate the severity of injuries that can occur during crashes, making helmet use a crucial aspect of motorcycle safety.

While the other considerations like style, warmth, or visibility might have their own merits, they aren't the central reason for helmet legislation and recommendations. The emphasis on helmets stems from extensive research and statistics that demonstrate their effectiveness in saving lives and reducing the severity of head injuries. Therefore, wearing a helmet is an essential practice for any motorcycle rider concerned about personal safety.