Yeah, it's the same "logic" as when calculating losses to torrenting by equating the number of pirated copies with the number of lost sales. Of course they ignore the fact that the vast majority of those pirates would never consider paying even if pirating was absolutely impossible.
I'll venture a guess that a good portion of those downloaders aren't even watching everything they download to begin with.
I have bought 10s if not 100s of DVDs and Blurays that to this day are still in plastic wrap, as well as books with uncracked spines. I don't think I'm that weird, and that "tsundoku" [0] is likely a thing with downloaders as well.