As Gaben said, piracy is a service issue.
Streaming sites are a bigger issue because they're so easy to use, to the point where it's often easier to just view something on an illegal streaming site than to view it on Netflix. You can email your grandma a link to a torrent site and she can use it immediately. (I'd set her up with adblock first, ofc. But everyone should be using adblock.)
Meanwhile torrents, for people who aren't already set up to use them, are hard. You can't just email your grandma a link to The Pirate Bay.

