You are missing the point by a mile. We don't have to have seen the Pharaohs to know that they existed and we don't have to have lived in ancient Greece or Rome to know that the Greeks and Romans existed. The civilisations and the lives of people who lived there are recorded in history which can still be seen today. The sources for our knowledge of the Pharaohs can be verified in history.
Neither you or I were alive during WW1 or WW2 but do we say they can't be verified to have happened... because we were not there? Of course not! We rely on the people who were there and who recorded it at the very time it was happening. There are a myriad of sources that tell us that the Egyptians, Greeks and Romans existed. There is also a myriad of sources all over the world that confirm the world wars......but when we come to Jesus, what do we have....the Bible! A self serving, contradictory document compiled and written by people who thought the world was flat and the Sun revolved around the Earth. If any other event in history had only one single dubious, unverifiable source, would you believe it?
Our knowledge of ancient history comes from the records of people who were there at the time, those who saw it, those that lived it. In the case of Jesus, that didn't happen. Not one contemporaneous historian mentions him. The only source of information we have for Jesus is the Gospel. The Gospels were not written by Jesus' followers but by unknown authors decades after the events are alleged to have happened.