Your people in the know are wrong. The labels own a very small part of e.g. Spotify - around 5% - and the rest is VC and the founders. Deezer's IPO documents were clear on where the ownership of that service lies.
It's not that the labels own Spotify -- it's that by issuing limited-term licensing deals, and owning all of the music, they'll be able to charge whatever they want for their music, leaving just a little bit on the table to keep Spotify in business. Spotify reports $100m in profit? Just raise licensing fees by $90m at the next contract. Spotify won't have the leverage to walk away.
Similar to Netflix, Spotify will need to create some reason for consumers to stay with Spotify, likely with some kind of music or music experience that is Spotify-exclusive like Netflix-exclusive TV shows. Also, Spotify has invested a lot of effort into its curated playlists -- this is an attempt to get people to listen to Spotify the way they watch Netflix -- fire it up and watch/listen to "whatever's on," instead of searching Taylor Swift and getting angry when they can't find it.
I read it more like, because the music startups are so dependent on the licenses they are practically owned by the music industry ( though not technically) which I thought was kinda insightful.
