2 points.
1) I am a writer. Copyright laws insure that I get paid for my work. Bypassing the law is theft, plain and simple.
2) That said, It's hard to copyright music. The words are easy enough to sort out, the music is harder to prove who owned what. There's a musician, Rick Beato, on you tube that does a good job of explaining why there are so many lawsuits in the music industry. He uses the Spirit/Led Zeppelin fight to illustrate the problem. Short answer: all pop music sounds the same.