I am not suggesting one brand of helmet over another....just that they are proven to be worthwhile in some circumstances. If one smacks good ol' Earth at near warp speed....nothing is going to matter. It in those less than absolutely fatal circumstances they may prevent or reduce cranial injuries. When worn with visor down...eye and facial injuries are less prone to occur.
Plus...for the EMS God's and Goddesses out there they are so totally awesome in appearance....particularly if the competition wear them.