To buy the amount of music I listen to on Spotify would cost hundreds of pounds each month, so I prefer to subscribe for £10. I can still buy the obscure/local/unsigned music I want to listen to that isn't available on there.
To me the idea of owning music is tied to the need for physical media, which we don't have any more. We don't worry about owning TV shows for example because they weren't traditionally broadcast that way.