If there’s no power bump, then why would it be auto only?
while I agree with your logic and presented that weeks ago once learning about the NISMO ECU application in japan...... to answer why it would be auto only with no power in a hypothetical
they could still use the auto only route to make usage of the Sport + mode that changes the engine responsiveness and power steering feedback more aggressive than the current sport mode.
on the other hand I dont know if the sports resetting actually increases the power rating but only changes the curve?