It’s yet another way to screw musicians
Actually it helps lesser knowns get discovered by linking to them from better knowns so that is at least something positive for most musicians.
Also Roon provides no music itself. It just integrates external streaming sources into a richer experience for the consumer. Qobuz and Tidal pay teh artists is a different yet related story.
Also if you find something you like in Qobuz via discovery in Roon, you can buy teh files from Qobuz. Of course there is no pretty record or CD to look at when you buy it, you just own teh music now in case you fear losing access to something precious to you via streaming somewhere down the road.