“and scored 17 direct hits”
17 of them hit something is not the same as 17 direct hits.
The facility covers several square miles.
DIA Report on Iran’s military power, published September 2019: https://www.dia.mil/Portals/27/Documents/News/Military%20Power%20Publications/Iran_Military_Power_LR.pdf
Page 30: “The use of improved guidance technology and maneuverability during the terminal phase of flight
enables these missiles to be used more effectively against smaller targets, including specific military facilities and ships at sea. These enhancements could reduce the miss-distance of some Iranian missiles to as little as tens of meters.”
Page 45: “Iran publicized the first launch of a Shahab 3 variant—called the Emad-1—equipped with a maneuverable reentry vehicle (MARV), which could allow the system to strike targets up to potentially 2,000 kilometers away with near-precision accuracy.”