Martin Luther pointed out what the problems were with this system during his trial:https://en.m.wikipedia.org/wiki/Magisterium
The magisterium of the Catholic Church is the church's authority or office to give authentic interpretation of the word of God, "whether in its written form or in the form of Tradition".
The exercise of the Catholic Church's magisterium is sometimes, but only rarely, expressed in the solemn form of an ex cathedra papal declaration, "when, in the exercise of his office as shepherd and teacher of all Christians, in virtue of his supreme apostolic authority, [the Bishop of Rome] defines a doctrine concerning faith or morals to be held by the whole Church,"[7] or of a similar declaration by an ecumenical council. Such solemn declarations of the church's teaching involve the infallibility of the Church.
Christian doctrine consists of the accumulation of over 2000 years of ex cathedra dictats that contradict each other. The belief that the Pope would be infallible, is very sinful. That behavior is simply unacceptable.Martin Luther: I do not accept the authority of the popes and councils, for they have contradicted each other.
The Quran predicted this:
The reason why Christian doctrine is not closed under logical consequence, is because its core beliefs are fundamentally sinful. The truth cannot be reached by means of sinful beliefs.Quran 9:31. They have taken their rabbis and monks as well as the Messiah, son of Mary, as lords besides Allah, even though they were commanded to worship none but One God. There is no god ˹worthy of worship˺ except Him. Glorified is He above what they associate ˹with Him˺!