Correct, similar to what Ryan Moore and Fred Couples also do. Their body lines are aligned to "E", ball starts at "F" or "H"(push) and fades to "I". Also note that the amount of curve and distance between each letter is larger for emphasis and clarity. Nicklaus might only curve the ball 3-5 yards.
I think a lot of this semantics personally, but these charts are all assuming E is the flag ( assuming your hitting at it). Couples would be aligned somewhere left at like A, swinging toward C with the face pointing at D to get to his target of E. There's a push fade that accounts for alignment, path relative to alignment, and face relative to path. I do agree though that the ball flight laws completely fail to account for the body's role in creating these conditions. I think possibly because they were created based off radar data, and all this data is measuring against is a fixed target line. There should be an additional baseline measurement by these devices to confirm if the player is actually lined up square, otherwise the data seems like it would be misleading for a lot of folks.