That's only because Adobe isn't in the movies business.
Yeah, that's right. Movies aren't subject to illegal downloads. /s
(On a more serious note, while I'm not a supporter of the draconian DRM schemes that have been enacted into law -- and while the studios make completely ridiculous claims for damages -- implying that films aren't being copied in a way that conflicts with their licensing terms is clearly wrong)
That said, having the legal right to something, and being able to enforce it, isn't the same thing (just ask Adobe).