It isn't about encryption, since if a content provider can get a hand on a torrent file or a tracker + magnet, they can get all the IPs of everyone in the swarm

It isn't about encryption, since if a content provider can get a hand on a torrent file or a tracker + magnet, they can get all the IPs of everyone in the swarm. The only way to avoid that is having your traffic routed through someone else so you can't be directly visible, which is expensive in the broad sense.