>>273812637
Yes, their already large market share is a part of the reason why they would not lose too much by not blowing their load and publishing SteamVR builds. 

Valve doesn't give a fuck because they don't need to. People who get an Oculus headset are more likely to not to already have Steam installed and be buying games on Steam instead of Oculus. That's why Oculus wants to at least as many users as they can on their store instead of further supporting Steam.