That's not Lidarr's fault though. Lidarr gets the data from MusicBrainz, and MusicBrainz is very community driven. So if no one adds data to it, they won't have the data automatically.
Also, the music piracy scene is just not as standardised as movie and TV shows. It's hard to automate when every releaser uses different naming format.
Yes. As with all too good to be true things, even if it's true, people will abuse it and force to be not true anymore.