What the Church has stated in writing is what The Church believes. Anything else is hearsay. To take what a person on the street says and extrapolate that to what everyone of his religious group believes is silly.
You did make an error.
Prove your statement " Mark is not alone and it's not the first I've encountered this" --> I've already told you the Bible is inerrant to me and I've already shown you official Church doctrine on the same.
You did make an error. Prove your statement " Mark is not alone and it's not the first I've encountered this" I'm not going to pull other Catholics from this site into this conversation. However, I would point to Catholic Answers where in an unscientific poll 40% of the Catholics believe the Bible to contain errors.
Here's another article Catholic Church no longer swears by truth of the Bible. If you believe this to be a hit piece on the Catholic Church, I suggest you read through the Del Verbum. Please pay close attention to how the pattern shifts from the word of God to the Church in around chapter 8.
But in order to keep the Gospel forever whole and alive within the Church, the Apostles left bishops as their successors, "handing over" to them "the authority to teach in their own place."(3) This sacred tradition, therefore, and Sacred Scripture of both the Old and New Testaments are like a mirror in which the pilgrim Church on earth looks at God, from whom she has received everything, until she is brought finally to see Him as He is, face to face (see 1 John 3:2). 8. And so the apostolic preaching, which is expressed in a special way in the inspired books, was to be preserved by an unending succession of preachers until the end of time. Therefore the Apostles, handing on what they themselves had received, warn the faithful to hold fast to the traditions which they have learned either by word of mouth or by letter (see 2 Thess. 2:15), and to fight in defense of the faith handed on once and for all (see Jude 1:3) (4) Now what was handed on by the Apostles includes everything which contributes toward the holiness of life and increase in faith of the peoples of God; and so the Church, in her teaching, life and worship, perpetuates and hands on to all generations all that she herself is, all that she believes.
As confirmed in this article and the Del Verbum, the scriptures mean nothing. They were only meant to exist until the Church could be established and serves the Church. It is the "holding fast to traditions" that is important. Now where did I hear that one before?