Sorry, bullshit. Working in the shop I've met more "Joe Pirate" types than you have had hot meals and ya know what? they pirate several orders of magnitude more than they will EVER use. I know one guy has over 30 spindles of music, how much has he listened to? NONE, because the thousand or so songs he actually listens to are already loaded on his laptop but if he likes ONE song from an artist he feels compelled to get EVERY song by that artist, even if he will never listen to a single one except that one hit he already has on his laptop!
I've seen the same thing in games, both with guys that have every game for every console while playing MAYBE a dozen games out of the whole smash, and with the guys that collect genres like FPS or RPG where again they play maybe 1 out of every 50 that they download, and in movies where they will download every movie in a genre (say horror) or every top 10 movie while watching again MAYBE 1 out of every 50. I don't know whether its a compulsion like hoarding or just a need to collect something but I'd say if you magically made perfect DRM tomorrow there isn't a single pirate that has walked through my shop that would buy more than a handful of the stuff they listen/watch/play all the time and the rest? It would just go into a giant "don't care" black hole never to be seen or heard from again.
Hell even I am guilty of this as I'm addicted to Steam sales and Humble Bundles, I have nearly 200 titles in my Steam, and probably just as much if not more in DRM free formats like GOG and direct downloads from the bundles...how many have I actually played? Maybe a quarter if that, how many have I played more than 10 minutes? Maybe half of those, all the way through? Maybe TEN. So if Humble Bundles and Steam sales didn't exist i would be just as happy as i am now if I would have only bought 10 games, looking at what I've been playing of late 4 RPGs and 6 shooters would be more than enough, so the only difference is those that made the other 390 games would not have a snowball's chance in hell of tempting me with squat as i would have never sampled their wares, that's all.
And at least in my case I can state the opposite is also true, i wouldn't have the entire Joss Whedon collection as well as the Marvel movies if it weren't for piracy, as there was no WB in my area so the first half season of Buffy on P2P got me hooked on Joss Whedon's writing so if it weren't for P2P I wouldn't now have the box sets for Buffy, Angel, Firefly, as well as the Avengers and the Marvel cinematic universe, all because i caught those first episodes of Buffy on P2P. Would I have bought them otherwise? Not a chance in hell, a horror series starring a soap actress and the guy from the Taster's Choice ads? Doesn't sound appealing from where I sit.