Let's start with the Nicene Creed because it best illustrates my point about institutional Christianity and the hubris of it's leadership. The first question you have to ask is which Nicene Creed do you look at as the rule of your faith. The creed that was created by theologians brought together and led by a pagan in 325 AD, or the creed that was adopted by a state-church coalition in 381 AD.
I think in either case a we see a statement that "all right minded Christians" are expected to revere as equal to Scripture. Additionally, in both cases we have a statement being created by men who are driven by a political agenda and the belief that they alone can define what is truth and all 'right minded Christians" must blindly adhere to it.
The creeds came because some get quite different meanings from the same Scripture, Arius for example.
Saying one reveres Scripture can means they revere their version and interpretation of it.
You cannot have one Lord, one faith, one baptism when the Church is comprised of individuals with their own theology.