Lidarr automates the acquisition but doesn’t actually supply you with any songs to download. I have to agree with them that pirating music is not easy these days and this is coming from someone in about half a dozen private trackers with around 60TB of TV and movies on my server.
Aside from finding the files, there’s also barely any standard for file naming and lots of different sources for specific songs (from multiple different albums even) which makes managing it all a huge pain in the ass (Lidarr does help with this part though provided your sources are good).