The more I think about this the more I simply can't believe someone that gets paid to comment on football could make such a statement.
More and more I am seeing the value of lead-up forwards given the modern style of fast footy. It is imperative to have guys that will work hard from deep forward right up to the wing to ensure the ball can be moved quickly and runners from the backline always have an option. With Pettifer and Richo we have two very good ones and it enables us to really move the ball quickly whilst still having very dangerous forwards deep. Guys like Hansen at the Eagles, O'Keefe at the Swans and Reiwoldt at the Saints are extremely important to their sides, as is Pettifer to ours.
Pettifer would definitely be one of those players whose value in a trade would be ok, but well below the value he actually gives to the side.