“In the West, the clergy had begun to assert an exclusive interpretive, indeed custodial, right to the Bible as early as the ninth century; and from about 1080 there had been frequent instances of the Pope, councils and bishops forbidding not only vernacular translations but any reading at all, by laymen, of the Bible taken as a whole. In some ways this was the most scandalous aspect of the medieval Latin Church. From the Waldensians onwards, attempts to scrutinize the Bible became proof presumptive of heresy - a man or woman might burn for it alone - and, conversely, the heterodox were increasingly convinced that the Bible was incompatible with papal and clerical claims.” (Paul Johnson, A History of Christianity, 273)
“From 1200 to 1500 the long series of Papal ordinances on the Inquisition, ever increasing in severity and cruelty, and their whole policy towards heresy, runs on without a break. It is a rigidly consistent system of legislation: every Pope confirms and improves upon the devices of his predecessor. All is directed to the one end, of completely uprooting every difference of belief... The Inquisition ...contradicted the simplest principles of Christian justice and love to our neighbor, and would have been rejected with universal horror in the ancient Church." (Johann Joseph Ignaz Von Dollinger, The Pope and the Council, p. 192-193)
Whenever one departs from the self-sufficiency of Scripture, whatever the written revelation affirms, denies, or says in general becomes irrelevant. Hence, that is the explanation for the development of all the unbiblical doctrinal developments which happened within the Church of Rome throughout history.
It is a proven fact that the Roman Catholic Church cares nothing about the Bible.