In the Journal of Pediatric Exercise Science, "The relationship between impact force, neck strength and neurocognitive performance in soccer heading in adolescent females.", the authors looked at heading, it's subconcussive impacts and neck strength. After extensive study their conclusion was, "This suggests neck strengthening may be an important component of any head injury prevention/reduction program."
Head impacts are common in contact sports and in a sport such as soccer a necessary part of the game. Attenuating head forces is the responsibility of a well constructed preparation program for sport. Having neck exercises as a normal part of a physical education exercise program should be commonplace in society for preparation of any sport. https://info.rogersathletic.com/get-strong/bid/99013/Preventative-Sports-Medicine.
Always prepare athletes for the rigors of the game. Get their necks Strong.