What's the catch with Stremio + Torrentio + Real Debrid

After my last post on here asking about convenient streaming options at higher resolutions, I got a few comments recommending Stremio with Torrentio and Real Debrid.

I ended up going through with that and streamed a 4k movie. That said, what's the catch? I'm a little paranoid because I'm not sure if this still counts as torrenting, and if I should be using a VPN while watching something from RD.

No such thing as free lunch, so I'm assuming there's other downsides to this solution, could someone let me know what they are?