I said no such thing. I do believe that significant sales are lost due to piracy but I didn't even say that, and that's not at all the same as assuming a 1:1 ratio.
While I do think piracy is a problem, I agree with you that they handle it badly. It's like forcing people to watch anti-piracy notices before a film (hey, you know who isn't annoyed by those? Pirates, dumbasses!), they're being as counter-productive as they could be.