Think of playing pool. The cue ball just sits there until you hit it with the cue. You can get the best and most expensive cue in the world and the best table in the world but until you hit the ball, it's not going anywhere.
Weight training is the equivalent of hitting the cue ball.
It's what creates all the good muscle growth. The protein just provides fuel for the muscle to grow in response to the training. SO that trainer is dead wrong. Just adding protein without a training program won't do squat. Messages entered in all CAPS will be deleted.