If it's randomly selected from the entire music library of Spotify, then it won't be good. Most of it would come from a long tail of bad or niche stuff. For a

If it's randomly selected from the entire music library of Spotify, then it won't be good. Most of it would come from a long tail of bad or niche stuff. For a practical example see https://en.wikipedia.org/wiki/Special:Random https://en.wikipedia.org/wiki/Special:Random - odds of finding an article that's both interesting and high quality are low.