What a strange perspective. How does piracy dilute the work's value? I would think most informative/artistic work is elevated by spreading awareness to more people. For a lot of creators that's a primary goal (otherwise there is easier work to be had).

What is lost by piracy is some potential cold hard cash for a copy of the work, which partially filters down to the creator. Also "control" of the distribution, for whatever that's worth.

No problem if you totally hate piracy, but at least be honest about what it is and what it impacts.