The thing that I always find baffling about the way head on head collisions are viewed is that there appears to be an automatic assumption that blame for the collision must always lie solely with the tackler and not the ball carrier. Not saying it was the case in this instance, but simply having a rugby ball in their hands doesn't make a player incapable of a reckless action that could endanger a defending player. Tacklers are encouraged to get lower, but if the ball carrier goes equally low, then where does that leave the tackler?