Shennong's Sitting Tiger does 71% less damage against buildings under construction

Compared to an Egyptian Catapult or Fuxi’s/Nuwa’s Sitting Tiger it does 71% less damage against buildings under construction. (Because it uses “damage per hit” instead of “damage per second” and buildings under construction ignore the bonus damage.)
Imagine a Wonder under construction. It’s unacceptable.
The area damage with 4 range gives completely nothing, when the target is Barrack sized or larger. It only useful when the target is wall, tower, house, or dropsite. It doesn’t compensate Shennong’s Sitting Tiger.