Its maybe less confusing than it is just not talked about. Churches dont like to bring up how mortal people have been sculpting the documents that they say came from god. Its a hard contradiction to swallow, to the point where I think most religious people would change how they worship if they realized the books in their hand are entirely the word of men, written with all of the biases any human has.
Even if we accept it originated from some holy place, the firsthand accounts of those that were with Jesus, we have to accept that that has been translated and copied so many times, by hand, that the words there are no closer to god than Harry Potter.