I highly question the position that God "needed" anything to bring about the plan of salvation.
Heretics who believe only in Scripture are almost impossible to argue with or convince that their interpretations are wrong because they won't listen to anything but what they believe is written in Sacred Scripture and that warm fuzzy feeling they get when they latch on to a particular interpretation.
Yet Scripture, which you seem to put down and ascribe to being used only by heretics, is the only Spirit given message we have.
That cannot be said about the writings of the early church fathers.
Can things in scripture be taken out of context?
Yes they can. We see evidence of that on this board with a lot of roman catholic teachings as evidenced by the titles, dogmas, prayers, etc, ascribed to Mary I posted as an example.
The discussion we've had on the Eucharist is another. One cannot appeal to the ECFs as they are not in 100% agreement on the issue.
That brings us back to Scripture as the only reliable document we have that is Spirit inspired.
The problem again, though, arises from taking a verse out of context and not understanding its use within the Bible.
In the class I teach on Sundays, I emphasize that context is the key to understanding the Word. A working knowledge of the early first century is a great assist in understanding the NT.
I cannot emphasize enough though, the need to know the Kione Greek. The Greek will eliminate a vast number of misunderstandings of the text.
‘They don’t need no steenkin’ Koine Greek, they got the magicsteeringem!’