Your entire premise that copyright infringement is theft is wrong. That is not the case, neither morally nor legally.
As a result, your argumentation is flawed. The 1000 "pirated" copies were never copies that you had. Even in a world where you could magically prevent all sharing of information you would not have that many more copies sold.
As a result, your argumentation is flawed. The 1000 "pirated" copies were never copies that you had. Even in a world where you could magically prevent all sharing of information you would not have that many more copies sold.