You only understand parts of the game, and this creates a blind spot, deceiving you into thinking that you understand rugby.
All you see is carriers, nothing else. A team is a sum of its parts, which goes beyond your simplistic and dogmatic view.
For example, loose forward play. You would persist with the creatine twins, and if they were triplets you would play them all in one backrow - but they are not all-around loose forward players. At best, decent ball carriers, but helpless on the ground.
No point having a backrow of ball carriers without the ball.