It appears that we will have to agree to disagree on this. All the tenets of the Nicene Creed are there because the Catholic Church defined it. Of course, it was based on Scripture, but they were counteracting heretics at that time and it all needed to be defined.
Is that so difficult to understand? Or am I being dense here?
If the Father gave birth to the Son in eternity, that would make the Son have a beginning and thus, He would not the eternal 'I AM'.
The Creed places the Son as coming from the Father in eternity, when in fact, they always co-existed together as God.
The only difference between the Arians and those who wrote the Creed is that the Creed writers moved the question into eternity, hoping that would appease the Arians.