I agree that the robotic hand grasping an apple is not just a specialization of grasping a ball; in fact, we might wonder if we would consider it as such if we hadn't already bet on this idea. With fresh eyes, asking a robot to manipulate a delicate and irregular object like an apple is a very different problem from a rigid ball. For example, if the robot faced a bruised or oddly shaped apple, the ability to adapt without crushing would require a redesign of sensors and algorithms, not just an adjustment.