I honestly don’t know how exactly a RB is suppose to do this. They will have to run upright and allow the defender to tackle them, which will probably result in more injuries.
Jim Brown never led with his helmet, if he could do it so can everybody else.
I don’t think there is any way to not lead with the head unless you slide or turn your head to the side in the attempt to hit with only your shoulder, which seems to me like an increased likelihood of breaking your neck. Rather than stop injury this stupid rule will probably be the thing that really does get someone killed on the field. Just another unintended consequence of liberalism and the wimpification of America.