Seriously, we can land a rover on Mars. We can a control and communicate with it. All this technology and all we get is a blurry pic circa 1975?
Geez...
We usually use lower res/black and white imagery for distant viewing and bulk image collection. It's way less data that needs to be beamed back to Earth. We'll start taking Hi Def images once we have a target.
However, I don't think the rover that took this image is equipped with any kind of quality camera. It's China's first lander since the 70's, and the primary objectives for the mission were/are to orbit the moon, land, and do a sample return. It's not really exploring. It's more China's way of dipping their toe back into the lunar ocean. I wouldn't be surprised if the cameras that took the cube image are for navigation purposes only.