When the Protestants split off from the Catholic Church they had to totally Revise the Christian faith to justify their rebellion from orthodox Christianity. Their vehicle for revising the faith was to have it center on the Bible as the ultimate authority on faith and practice, which has worked pretty well for them other than where the Bible presents no clear direction.
The Catholic Church, by contrast, believes in an organically expanding revelation guided by both The Bible, and the traditional understandings passed down through the ages from the Apostles, Saints, and the Church itself.
Thus you see the constant appeal to Scripture as authority from Protestants and their rejection of Catholic for not heeding their appeals.
And there you see the problem with the Catholics. They equate their tradition and extrabiicak writings and increasingly heretical doctrines with Gods Word.
In other words...Rome continues to make up things and uses this "tradition" to justify their false teachings. Much of Roman catholic Mariology is based on this "expanding revelation".
Roman Catholicism resorts to this when it cannot identify in Scripture its false teachings.
Mormons and other cults also teach ongoing revelation.
Thus you see the constant appeal to Scripture as authority from Protestants and their rejection of Catholic for not heeding their appeals.
Scripture is appealed to as only it is the Word of God. Only it is inspired.
Rome cannot make that claim for its "Sacred Tradition".