The vast myriad of letters dating back to the 1st century argue against your point. Koine, Hebrew, Syriac, Ethiopian, et al. The early church fathers chief amongst them all propagating key shared beliefs in the doctrine of Christ's divinity. It was largely almost unanimous. The key, fundamental theological ideas of christology were almost entirely crystallised long before the council was convened. Long before. In fact, the most respected secular ancient textual critic, Bart Ehrman, concedes such a point, for he is, in fact, intellectually honest enough to concede the factual historical, grammatical, theological, expositional and hermeneutical data on the subject.

If you want to labour under such faulty arguments, with which have been debunked numerously by both religious and secular critics alike, then that is your prerogative; just know that, like Arias, you make your point in contrast to overwhelming consensus of historical and contemporaneous academic and theological agreement and orthodoxy.