Protestant teach that the author of Scriptures is inspired by God when they wrote them. And Scriptures are all the word of God. Thus, the teachings insides are 100% correct and no mistake.
However, the translator of bible would always make mistake.Just like in 1 Cor 3:15(e.g.but he himself will be saved, yet so as through fire. ), the translator of NIV just add a word 'escape' to fit with Protestant's teaching of salvation(e.g.but yet will be saved—even though only as one 'escaping' through the flames.). By fire/ through fire/ passing the fire does not mean escaping through the fire. When a substance pass the fire, it may become brighter, stronger and more valuable, or it may be destroyed by that fire. The meaningof 1 Cor 3:15 in NIV have been totally changed by Protestant translatosr.
Also, the meanings of bible verse are all determined by how we interpret them. That's why no matter the teachings of Calvinism , Arminianism, Universalism,Lutheran, Charismatic,Wesylan,Jehovah's Witnesses,Seventh-day Adventist, Prosperity Gospel, etc, they are all supported by bible verse. Since the meaning of the bible verse depends on how we interpret , everybody has good interpretation skill on bible can form a theology easily.