Haiz, those questions are the best questions.
Meanwhile, this happened. True story.
Me: Hey, Spotify, I like this song! Can you make a radio of it for me?
Spotify: Sure! Here's another song by the same author!
Me: Oh that's nice, but I was kind of hoping to find other authors?
Spotify: Hmm... how about this song that sounds like what you're looking for, then suddenly turns to hard rock and somebody screaming about death?
Me: Um, no? Let's not.
Spotify: Okay, then how about this entirely unrelated song apparently played by a panda on a trombone?
Me: ... what?
Spotify: Fine, fine, we'll go back to another song by the artist you originally put in...
Me: ... all right...?
Spotify: ... and now for a song that's literally about Satanism! Die die DIE DIE
Me: Next, NEXT.
Spotify: BACK TO THE PANDA.
Me: WHY.
And that's why I now have trust issues with Spotify.