Wrong, a chip is a shot were the bounce is not utilized. A can hit a high chip, low chip, medium chip. I can hit chips that run out or land soft. I can do the same with pitches, just depends if you are using bounce or not.
I could understand this if a person has the yips, then adding a restrictive movement is fine.
What Erik and this thread is teaching isn't really a swing that uses the wrists. Its a swing that allows the clubhead's momentum to carry through the ball in a way that utilizes the bounce of the club. The bounce on the clubhead allows for maximum error since it allows the clubhead to glide even if the person happens to hit behind the ball. That is why the pitching video shows almost a float load were the hands start down before the clubhead does. This allows the clubhead to drop down in a smooth athletic motion. Really this method of pitching is so much easier than using just the body and arms in a rigid method because it takes manipulating the clubhead out of the equation.