If Jesus was truly concerned with spreading his teachings he would have written a book himself. The gospels were written decades after he died and they weren't even written by his disciples. So we don't truly know what he said.
So many contradictions and made up ideas. Whose to say what his true intention was.
I think that the NT writers would have done a better job if they knew that in the future most of the world was going to rely on their works to learn about Jesus.
They're probably in heaven saying "We really fu**ed up."