And why this is a nonsense argument for not using treats in training.
The dog that only listens when he sees the treats is the same dog that only listens when the leash is on. When the leash comes off, he knows you can't pop his collar. When the treats go away, he knows you can't pay up. In both cases, the solution is exactly the same: set up the situation to teach the dog that consequences are still in effect even when the leash is off and the treats are invisible.