PU head positioning

[shipwreck]

Why is it that many evaluators want the PU's head height to be at a certain heighth in comparison with the catcher's head? One evaluation said I was too low, so I adjusted it higher. The next one said I was setting up too high. I hadn't adjusted that much from one time to the next. Both used the catcher's head for a point of reference. I have always adjusted my head heighth according to the heighth of the batter, eyes at the top of the strike zone. Most catchers set up at the same heighth no matter how tall or short the batter is. Am I wrong? Dave