You have to remember that Steam has so many users, so every game brings a sizable chunk of money to Valve. They can't pass on it. Oculus has Facebook behind it and can afford to be picky. In a long run it's a win/win for everyone.
Well it certainly isn't a win for small developers with no recourse on rejected submissions. We had to stop development and put out a release on Cardboard, then focus on Vive (because it's Steam, and they allow all developers access to an open market!) If Oculus doesn't change their policy it's a quick death for Gear VR when a new suitable headset hits the market. If they don't change their policy soon, I would be too soured on Oculus to try again on their platforms. Once bitten twice shy.
