well, you better hope we are right when we set the canon of the NT.
and you better hope we faithfully copied the NT over 2,000 years.
i sense a devotee of Ellen White, am i right?
You sense wrong. Used to be SDA but no more for that very reason. Ellen White carries as much weight as your Pope with me, which is very little. When Jesus was tempted by Satan, did he answer by "It is written" OR "Church tradition says"? Well, which one? And as much as churches (yours too) wish to misinterpret scriptures, the Sabbath is still the Sabbath. No record of Paul (or any of the apostles) carrying a crucifix or saying 3 "Hail Marys" is there? The Bible is Gods Holy Word because that is the way He wanted it.