
You're making the ridiculous assumption Ginbey meant to push his opponent into his vulnerable teammate's back, which is the dumbest thing anyone's theorised about this incident.Duty of care is further defined as what a reasonable player may think is prudent in the circumstances. It can be assumed that the scenarios you list would be considered prudent by reasonable players because they are within the rules of the game. They are legitimate choices a player has. What Ginbey did is not within the range of choices a reasonable player would consider prudent. It is pretty easy to see this by watching the sport played. You will see loads of legal bumps. Loads of players raising knees in ruck & marking contests. Almost no players choosing to push an opponent running at speed in the back with force into oncoming traffic.