The view of Sola Scriptutra is quite consistent with the RCC position on the informed conscience. Perhaps the genuine question has to be the role of the teaching office of the Church in validating the correct exegesis of a given passage, and or the correct scriptures to use when looking at a particular problem.
Which rather ignores the problem of what tradition is, and why authority is necessary and scripture is not the pillar of truth..
There is a reformationist view that somehow scripture and tradition are two wholy separate tracks, and that they are somehow "reverting" to scripture.
Which misses the point, and so does your diagram.
ALL teaching was paradosis - handing down, which is why Paul said "Hold true to tradition we taught you by word of mouth and letter"
Jesus gave us apostles, and succession, not a new testament, that came later.
He also gave the means to resolve disputes on interpretation of doctrine.
Which was the power to "bind and loose" given separately to Peter, holder of keys, and also to the succession (ie acting together, so in council)
It was always so. See Jesus' remarks on "moses seat" later usurped by the see and cathedra of Peter given the office of Keys.
The new testament was chosen (by divine inspiration) at least in part because it did not contradict with extant tradition. Books were rejected because the contradicted tradition. Tradition is not "something on the side" it is all of doctrine, which is bigger than scripture. Scripture is not in conflict with tradition because scripture was chosen because it aligned to it, ie did not contradict it but was never the whole of the faith handed down, nor was scripture ever the "complete manual" of Christian belief.
So if we look back at what was handed down, we discover interpretations of scripture. Take ignatius letter to Smyrneans. You see that the tradition handed by apostle John to polycarp and ignatius. That a valid eucharist of the real presence, really considered to be the body and blood of our lord, and can only be performed by a bishop or his appointee. That was tradition, also was why Christians were thought to be cannibals behind closed doors! Scripture does not contradict that, but clearly many of reformationist interpretations of scripture do contradict the faith handed down, ie tradition.
The meaning of scripture is also a part of tradition. You cannot divorce the two, as the reformers pretended. Scripture is not greater than tradition. Tradition gives the correct meaning to scripture.
And it is a fallacy that anything that fits with scripture is fine, and you can take your pick so long as it does not contradict.
Jesus handed us Christianity, passed by word of mouth and occassionally letter.
Solo Dei Verbum is the correct doctrine. Which is also sacred tradition,a part of which is sacred scripture.