While you are absolutely correct that the Christian Community comes first and then scripture, in the precise sense that it was the faith of the community over several hundred years that choose what was in and what was outside scripture. 

But is is also true that what is in scripture is normative for Catholics as well as those who ascribe to "sola scriptura." Our Catholic insistence on Scripture + Tradition is grossly abused when it is invoked CAVALIERLY as warrant for elevating Cannon Law or traditional practice over the clear message of scripture.

That does not make calling priests "Father" immoral, but it sure the hell is weird, and it sure as hell contradicts the plain meaning of scripture. I don't know for sure, but I wouldn't be surprised if the spread of the practice of "Fathering" priests were associated chronologically with a time when lay Catholics were fed more Baltimore Catechism than scripture.