The claim of the Roman Catholic Church being infallible puts its apologists at a huge disadvantage. If just one of its dogmas is refuted by Scripture or logic, then it follows that the entire system falls apart. If the Roman Catholic Church can be shown to not be infallible in teaching, then its claims to authority are not binding on us at all. In that scenario, faithful Catholics would have no choice but to give up Christianity altogether.
In Protestantism, one has to use Scripture to discern truth from error. The requirement to make independent decisions exists, with there being options to choose from. That comes with the advantage of a person being able to change his or her viewpoint in accordance with reason and available evidence. If, however, one wishes to defend the Roman Catholic Church's claim to infallibility, then it must be defended at all costs. That would place an excessive burden on one to believe ideas that are even absurd. This framework would make any thinking person susceptible to apostasy.