I don't.
1. Chances are very high that the person Rodney is talking to isn't a great player. Rodney most likely learned ghost ball at a very early age, and is simply teaching this person the method he knows most about.
2. Now if someone wanted to argue that this proves Rodney is a current ghost ball user, they'd be wrong. Like most top notch players, Rodney just sees the shot and gets down on the shot line. That only comes from experience, and you can get there by practicing GB or another method. It's an all roads lead to Rome sort of thing.