Wrong-o.
GOD preserved it.
He didn't need the Catholic church to hold His hand or do it for Him.
And yet all indications are that God used men, Jews and Catholics, to preserve the Scriptures for centuries.
What advantage then hath the Jew? or what profit is there of circumcision? Much every way: chiefly, because that unto them were committed the oracles of God.
It is a special privilege to be entrusted with preserving The Scriptures.