It’s a common comment, it sounds good, it’s quick and it’s easy.
But when you look at the facts the opposite is quite the opposite. There is more textual evidence of Christ’s existence, and the existence of the early Church, than there is for even Julius Caesar.
This image only accounts for the existing pieces of New Testament, never mind all that was written by Jewish contemporaries and early Christians.
Image from Mark Barry

It is important that we know about the physical collecting together of our Bible, it’s incredible, and rather than provide any reason to doubt, instead it provides yet even more evidence that Scripture is the very word of God, given and perfectly preserved by him.

For more information about the reliability of the New Testament have a watch of James White’s video.