Hard to know who to believe with today's slap happy media, but it reads to me "crash causes." I do believe the results of a crash cause study are going to lean heavily toward inability to negotiate corners at speed, which can be effectively remedied in large part by proper training. Today's minimum licensing requirement of how to ride a parking lot is not providing that particular skill set.
In that vein, I can't hate the AMA for looking forward so as to lower those numbers, as a means to stave off future "don't run with the scissors" type regulation and legalities.
An NHTSA required gyro coupled to a speed limiter comes to mind...
