No, Britni, you need to check your sources. The gospels were written 70 years after Jesus' death, much closer to the actual events than most historical accounts.
What you've read to the contrary is opinion. Of course, everything to do with the gospels is fodder for debate.
A fragment of the Gospel of Mark has been dated by non-Christians experts to 150 A.D. It is now accepted by most scholars that Mark's gospel was written approximately 70 CE.
So yes, there were eyewitness accounts, probably more so than the accounts we have of Columbus or Leif Erikson. Yet we don't doubt their existence.
Additionally, Flavius Josephus wrote one of the earliest non-biblical accounts of Jesus. And Polycarp, born around AD 69, was a disciple of the Apostle John and was taught by John. He became a renowned teacher, having heard directly from an eyewitness about Jesus, and was later martyred because he refused to renounce his faith.