I may not, am not able to, insist I know every contour of Everest. But I can insist it's not a hole in the ground.
Work with me. It's a weak analogy. I think the Nicene->Chalcedon stuff is like that: It's not a hole in the ground.
I want to chew on your post for a day or two. I think we need to read Fides et Ratio or something similar.
Ahh, but one must be cautious of the unintended consequence, my friend. Look at the inverse/reverse. When one declares TRUE, all else (that which is in opposition) must be made false. Things that are declared are necessarily enforced and defended, and suddenly a bright line develops... EVERYTHING outside of that line becomes heretical in an instant.
Look at what has happened on this thread. Our FRiend DouglasKC is not an unthinking man. Whether I agree with him or not, I appreciate his thoughtful approach to things, and his willingness to examine things in a thoroughgoing manner. And in the big picture, the formulation he adheres to is only incrementally opposed to trinitarianism - He does not deny the Father, or the Son, or the Spirit - and his view is quite defensible according to the Word. In fact, his notions wrt the Holy Spirit are directly in line with the older tradition of the Hebrews - The Ruach HaKodesh is defined by them in nearly identical terms.
Yet on this thread (and others), he has been excoriated, and thrown outside the camp. He has not been met with intellect and reason. He has been met with acolytes clamoring.
That is what creeds do.