No you don't get it. The sun reflects off the atmosphere which is usually brighter than the moon and stars. It doesn't matter whether it's day or night on the moon because there is no atmosphere and thus nothing to reflect and obscure the stars. That's why the "daytime" sky is black. To VB's point, while they couldn't before, they probably could manage recreating the stars in the "proper" positions with computers now. But that would bring up questions about the previous lack of stars, and also give more evidence to scrutinize for error, so instead they leave it black, say the cameras weren't working, someone forgot the switch, it got tipped funny, they never wanted pictures anyways and so on.