If you do not have confidence in the Bible that you are using and you would say, "This contains the Word of God and there are many errors in it" then how would others learn to trust God's Word? They would say, "As we read the Bible, we really do not know if we are reading an erroneous portion or it is the truth". Such will confuse the lost sinner as well as the believers.
I believe that God has preserved His word and His words are true and faithful.
The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple. Psalms 19:7 KJV
As for God, his way is perfect: the word of the LORD is tried: he is a buckler to all those that trust in him. Psalms 18:30 KJV
Thy word is true from the beginning: and every one of thy righteous judgments endureth for ever.
Psalms 119:160 KJV