I have been pro "get injury tackles out of the game" for a while...
No one wants their career ruined, money line destroyed because of a tackle that could be prevented.
There was a game last week when a player was pushed into the QB...the player was forced to tackle the QB around his knees...the play could have been so bad for the QB, like a snapped leg...but the player was quick enough to notice this and made the ethical decision to not go full steam on the QBs knees but made the tackle.
This can be debated...we can argue semantics until the end...but players are quick enough, mind wise, to know what they are doing. A split second before, during and after a tackle. Its not debatable. To argue that its a competition and things get out of hand in the heat of the moment is side stepping. The mind is quick enough. If you commit the penalty...its on you...not the heat of the moment.