None of this is true.

a) Spotify didn't invent music streaming. There were many services e.g. Pandora that were doing in the years before. It was a pretty obvious idea once devices had faster bandwidth.

b) Apple didn't steal their idea. They acquired Beats who had launched a similar service soon after Spotify.

c) Apple Music isn't privileged. It comes pre-installed but otherwise you can delete the app and use Spotify, Youtube Music etc.