If you define pulling as involving bending the arm much then I agree it kills rotation. But you can still very correctly call it pulling even with a fairly stiff arm _because_ of torso rotation. With a fairly stiff arm and good rotation the hand near the water still moves toward the stern and that hand still needs to be tight enough to manage that energy transfer. The upper hand pushing certainly adds to the overall paddle movement but isn't the sole cause of it.
Deck Rigging Gear
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