The Pope has them trapped with OTC. It robs Catholic laity of any power they have over the Vatican.
As long as the Catholics insist on ‘being Catholic’ the Pope has no reason to change because he still has total power over them no matter how evil he is. And because of ‘one true church’ and the demonization of Luther and all reformers, he has them trapped.
However, the Word doesn't change.
This point was brought out in an excellent debate I watched on youtube on sola scriptura.