If the Magisterium could endanger faith, lead souls to hell, or even just cause them harm, it would have defected.
Ladislaus and Cantarella,
If you believe the above, then how can you believe in Fr Chazal's explanation of sedeprivationism? If you believe the magisterium/pope cannot defect, then how can you believe he is in heresy and has lost his spiritual office?
To me, Fr Chazal's viewpoint where the pope loses his spiritual office when he loses his faith, is proof that the magisterium can defect. Because the defection from the truth was not
official, then such a defection is not of the Church, but just of the churchmen.