To me i don't see anything lacking in what he said, if anyone is finding it difficult to comprehend that simple and straight forward sentence then that's a Big Shame as well, you don't need to sugarcoat the sentence, "All we can do is Wait" is very simple and direct for any learned person to understand.
It is left for whoever choses to wait what they do in between the process of waiting, it is not in his place to tell you or anyone how to utilize your waiting period. Hope you understand that.