This is exactly what I thought of after seeing this clip. If the ref calls PD a second earlier here, this may not have happened. But if he did you’d have had people complaining that he shouldn’t have stopped it.
Edit: I do wonder if Askren would put this in the category of “he did this to himself” though. He kinda did, by stepping over then turning back, but it seemed like it was the opponent getting to his stomach (which obviously is what he should have been trying to do), that caused the injury.