I think they were trying to say that playing games from the Oculus store on a Valve Index or HTC Vive isn't possible, but playing games bought on Steam on a Quest 2 is possible.
It actually is one of the complaints I have about how Oculus does things, but since they basically ushered in this new era of VR, they pretty much had to have their own store and SDK. I can't fault them for not closing it, and nothing is stopping the developers from publishing on both.
You are describing all video game publishers, Nintendo, Microsoft, Epic, Sony. This is actually for indie developers, who can de-risk a project by taking the upfront money.
It actually is one of the complaints I have about how Oculus does things, but since they basically ushered in this new era of VR, they pretty much had to have their own store and SDK. I can't fault them for not closing it, and nothing is stopping the developers from publishing on both.