I can't imagine how the prophecies regarding the restoration of the nation of Israel could be more specific.
It was a self-fulfilling prophecy. What was written in the OT was widely known by Jews and they actively worked toward its fulfillment. The "prophecy" encouraged the Jews to fulfill it. There's nothing miraculous in that.
It would be like a child being told from young by his parents whom he loves and respects dearly, that he will become a doctor when he grows up. The child internalizes that message, causing it to shape his goals and achievements and he works towards it and it becomes a reality. His parents weren't inspired prophets. Their "prediction" served to encourage him to work toward it becoming a reality and it does.