Apple's iTunes is single handily responsible for popularizing DRM and MP3s isn't the only thing they sell. But if you think music is free of DRM, maybe you haven't noticed, but plan B is in effect: https://blog.vellumatlanta.com/2016/05/04/apple-stole-my-mus...
That's no bug, being how enrollment in Apple Music worked when I tried it.
And the purpose is to relieve the user of owned files replacing them with a streaming service, which is DRM enabled, losing access even to music for which the user owned the copyright upon cancellation. This is the essence of DRM, the user losing all control of his purchased content.
There is however something in the way you expressed yourself. Is this a strawman attempt?