I love how Valve provides a sdk that is only usable for their store, Steam (kind of like the sdk of Oculus is only for the Rift), which provokes conflicts with other versions of the game sold in other stores (and that way promote only using their own store for distribution), and the blame is in the other stores. And I thought the Apple fans were brainwashed...
That is completely false. OpenVR is not tied to Steam.
EDIT: I didn't realize you were talking about SteamWorks.
SteamWorks is obviously only intended to work with Steam services, but can interoperate with other networks, we have already seen that with Rocket League.