I know that, but there IS a motor. Elon has said this himself. what you are describing is far more expensive than a phased array with the scan needed for no motor. It is not a solved, inexpensive problem. 5G and wifi use significantly lower frequencies, which is much easier and cheaper to implement the phased array. Starlink is Ku and Ka band. There are no examples of a consumer version of these that is cheap enough. The only thing that came close is the oneweb, but that's only Ku, and it only exists in a Wyler tweet.