Scripture explains how and why the Bible survived, and it was not because human beings, either. It survived inspire of human beings. It survived because God keeps His word. It survives through the flood and Catholics weren't there.
Isaiah said, “The grass withers, the flower fades, but the word of our God stands forever” (Isaiah 40:8).
Jesus said, “Heaven and earth will pass away, but My words will by no means pass away” (Matthew 24:35).
Psalm 119 also teaches that God’s word is “settled in heaven” and that His faithfulness endures through all generations (Psalm 119:89–90).
Rest assured, that the Bible came through many faithful hands: Jewish scribes, early Christian believers, copyists, translators, and witnesses scattered across different lands. No single church owns its passage through time. No single institution controlled it from the beginning. That isn't true.
Rome did not preserve Scripture for the common people. The Bible survived despite repeated efforts to keep it chained, hidden, restricted, or placed under church control. God’s word endured because God promised it would endure. Men come and go. Kingdoms rise and fall. Churches appear and disappear. The Word of God remains.