The Hubble telescope has the great advantage over land-based telescopes of taking images from outside of the planet's atmosphere, which greatly blurs images. Nevertheless, the Hubble has two major disadvantages relative to land-based telescopes: it is difficult to repair, and to maneuver it requires the use of fuel, which will ultimately run out. An adviser at the space agency has proposed equipping the International Space Station with small robotic spacecraft that can be launched from orbit to repair the Hubble at a much lower cost than a repair craft launched from earth would cost.
Which of the following, if true, is NOT a serious weakness of the space agency adviser's plan?
【选项】
The robotic spacecraft proposed by the adviser will incur significant design costs not incurred by a repair craft launched from earth, which already exists.
选项是否正确？