Why did not God preserve the originals by a miracle?

The Catholic Answers

That was not necessary that we might know their contents. We have true copies. Also that would not have bettered things. Christ did not base His religion upon the reading of Scripture. He established the infallible Catholic Church to teach in His Name. That Church He has miraculously preserved.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty