My argument is that you have no argument. You have yet to demonstrate, on a patristic basis, that filesharing is thievery.
You are making me look like a Protestant quoting Sacred Scripture, Mateo-

How about Sacred Scripture, whom the Fathers of the Church had common sense that thievery is a sin and never really had to write on it because common sense dictated that property is property and stealing is stealing. Is this satisfactory?
Exodus 20:15 “You shall not steal"
Deuteronomy 5:19 "You shall not steal"
Jeremiah 23:30 "30 “Therefore behold, I am against the prophets,†says the LORD, “who steal My words every one from his neighbor"
Matthew 19:17-19 "So He said to him, “Why do you call Me good? No one is good but One, that is, God. But if you want to enter into life, keep the commandments.†He said to Him, “Which ones?†Jesus said, “ ‘You shall not murder,’ ‘You shall not commit adultery,’ ‘You shall not steal,’ ‘You shall not bear false witness,’ ‘Honor your father and your mother,’ and, ‘You shall love your neighbor as yourself.’â€Â
Romans 2:21 "You, therefore, who teach another, do you not teach yourself? You who preach that a man should not steal, do you steal?"
Ephesians 4:28 "Let him who stole steal no longer, but rather let him labor, working with his hands what is good, that he may have something to give him who has need."
Where was this concept of "intellectual property" for most of the Christian era?
Non-existent, but at least most contributed to the dead guy they wrote about when they copied each other. So in a sense, they at least gave credit.
What about those of us who live in countries where such a law is technically on the books, but the government either looks the other way or openly aids copying?
If you want to approach the throne and say, "well, everyone did it and the law really did not prosecute, so..." then go right ahead. Semantics.
Panagiotis