Now where on earth did you get the idea that the “Protestant” organization were ever declared 100% correct? I have seen no one on these threads declare that. How could they be? They are all daughters of the RCC and as such have retained many errors of her. It’s scripture that is 100% correct and is the only source to be relied on for doctrine.
Well, the original Scripture is 100 percent correct... but not all the versions made by men to suit their own personal interpretation of Jesus. Leaving whole chapters out so those pesky passages that say works are needed are forgotten is a crime.
The Catholic Church collected the 100 percent correct Scripture, working with the Holy Spirit. We have the complete version, not the edited, dumbed-down version created much later by disgruntled men. I feel so sorry for anyone who reads the abridged version of Sacred Scripture. What a terrible loss.