I agree with you,a flawed Bible does not affect a well educated Catholic/Orthodox who know their faith well because we understand the correct interpretations and meanings of Scripture and can trace these teachings back to the writings of the Church Fathers consensus and final dogma at some point on many important teachings
It is not so much what we understand as what we hold to be true. During my religious education and conversion process I encountered numerous difficulties with areas of interpretation, doctrine and dogma. Where the modernist or relativist Protestant, and even the lapsed Catholic would take the position that their own capabilities of discernment and rationalization were what must determine the truth I had faith in the teaching authority of my Church. Rather than truncate my studies and starve my understanding of the truth I am humble enough to admit that the difficulty and shortcoming is in me, not my Church and that I owed it to God, my Church and myself to keep studying and praying until I "got it". In every case, when pursued to the end, I have found the Church to be right.
Those whose authority is themselves or highly flawed persons they cite as authorities on par with the Magisterium simply on the basis that their expert agrees with them, are demonstrating a lack of faith. I feel as compelled by charity to aid them by feeding them the truth as I do to feed hungry children bread.