What’s so hard to understand? I didn’t say there is an open-ended heter to copy at-will. Hasagas gvul is a concern, depending on the circumstances and situation. But other times hasagas gvul is inapplicable and you can copy.
If you feel it is “gezel” to copy, please explain how most poskim allow making a copy of a CD for your car (with the original at home) or a backup copy in case the original gets too scratched up or copy your CD to your iPad or MP3 player. Do you, against the general halachic consensus, feel even those copying is prohibited? And explain how those copying is any different than copying a CD from a friend that you are 100% certain you would never have otherwise purchased.
“In fact, can you cite even a single Posek who explictly denies intellectual property rights.”
Rav Yaakov Shapiro shlita, of Bayswater. And Rav Yosef Shalom Elyashev shlita.