It feels like such a mental gimmick.
1) finding and downloading torrents requires know-how
2) finding and downloading subtitles that match the audio is often a chore and requires know-how, often time consuming
3) using a decent player on most devices and finding the files on the filesystem requires know-how, especially on mobile devices
While I understand that users on HackerNews are more tech savvy and don't find any of those particularly troublesome, to compare it to the ease of launching Netflix is just mental gymnastics. Average users won't find any of this convenient and will require to acquire know how in search engines and setting up players.