"Do you believe that every idea that popped into the Apostle Paul, John or Peter's head apart from what the Church has stated to be inspired was a direct oracle from God?"
Surely you are not suggesting that the Gospel of +John is not inspired are you? If that Gospel was inspired of God, something we know because the One, Holy Catholic and Apostolic Church (not Calvin or anyone else) has told us so, why do Protestants reject its words on the Eucharist and, for that matter, +Ignatius' Eucharistic theology which he learned from +John? +John didn't reject him.
No. But what you are suggesting, or it appears so, is that +Ignatius' writings are just as inspired as the Gospel of +John.
The early church distinguished between what was inspired and what wasn't long after Ignatius left. Ignatius' writings were never classified as inspired according to the early fathers.