Does it benefit Apple from removing this app? Yes, because it has a competing service - Apple Music. Apple shouldn't be the middle-man here deciding what apps its developers can create for its platform and what apps it users can install and use. It is prone to abuse, as many examples highlight. Even Apple shareholders should be questioning why Apple is wasting its time and money on litigations on legal disputes between third-parties (here the copyright holders and the developers).

Nobody challenges Apple's monopoly of first-party services in their own domain.