This depends on the level of hit that the sport causes, how often it happens, and the type of helmet and the design goals of that helmet. A motorcycle helmet o

This depends on the level of hit that the sport causes, how often it happens, and the type of helmet and the design goals of that helmet. A motorcycle helmet or auto racing helmet will do a much better job at preventing a concussion than a football helmet and is designed for bigger hits against harder surfaces. But no one wants to replace a motorsports style helmet after every play that causes a hit on the helmet in a football game. Hence they wear football helmets, which are designed to be much less protective for a single large hit but to be able to protect against sustained smaller hits. Realistically I think this is the elephant in the room for football. The NFL could afford to have each player go through hundreds of helmets a season and they would be well protected. But as soon as the NFL admitted that was needed everyone would demand it for college and high school, and it would be too expensive and fewer people would play football.