It has to be done by the sport, and each sport has to look at this.
My background is in equestrian sports. I'm the national team physician and it took 10 years for us to change that rule. It's the culture; it's slow moving, but it really has to come from within the sport. Sports organizations need to be nudged to look at it and to ask why this is happening in the sport. Why are athletes coming in with the most injuries and the most concussions into the emergency rooms?
For somebody from the outside to come in and say you're going to change your sport like this, I'm not sure how successful that would be.