There are a number of factors at play here. Part of the issue with some of these injuries is that group of...I would say the teenaged boys and those in their early 20s who think it's not going to happen to them--they're invincible, helmets are sissy, and they'll bounce back. And of course that doesn't happen.
There are a number of associations or organizations, particularly in the brain area, that are trying to improve the tools we have for education, to improve the role models for safe sport, particularly for that group.