> There is every indication the copies were made of the original before it was destroyed.
No, there is not. The NT began to get written down by anonymous authors collecting their oral tradition several decades after the events they record. Behold P52, the oldest scrap of a NT manuscript, dates to ~135 C.E.
Measuring only 8.9 by 6 centimeters at its widest points (3.5 by 2.5 inches), it's a fragment of the book of John.
That's what you have to grasp: a tiny fragment, written a century after the events described. That's as close as you have to an original manuscript.
What difference does it make whether you have a million copies of what came after?
btw, if Christians acted like Jews, this would be the most venerated object in the world. Instead, because Christians have a fairy tale understanding of their own scripture, it rests almost unknown in an obscure English library most Christians have never heard of.