Not so. It was the early Church Fathers who consulted tradition and decided which books would constitute the Bible. The Bible did not fall out of the skies. It was authoritatively decided by the Church founded by Christ and inspired by Divine Revelation.
Which belief is entirely part of sacred tradition ...
The Bible says that by the Word of God was everything made that was made, and the Word of God will not return to Him void, but will accomplish His will. And Jesus spoke of people swearing by the gift on the altar, when it was the altar that made the gift holy. The point is that the Catholic Church has given too much unquestionable authority to the Catholic priesthood, that they are even above God’s Word and are said to be its authors, or co-authors. But God’s Word was in control. If Esther hadn’t risked her life, salvation would have come to the Jews another way. God “needs” no one. While the Bible says the Lord is the answer, and the same is said by those who follow it, the Catholic priesthood says it’s the answer. Paul also chastised a church for not maturing to be teachers by that point. That is for every believer, to be a priest of the Lord. While there are types of legitimate authority, the Catholic priesthood is like a false god.