Planescape is a good omni-setting for telling whatever type of story in whatever type of genre you want. Other systems benefit from being more focused. Glorantha is better if you want a Bronze Age sword and sandals setting, IMO, but if you want to do funky multiverse stuff it has basically nothing for you.
Anyway, I think the reason literary organizations don’t award settings is because they are generally interested in stores, and settings are just a component of that. I’m sure you could find some industry awards for setting development, and I bet Planescape stuff does well there. They are just not as interesting to outsiders.
Also I want to push back on your “the topic at hand.” I was talking about the stories themselves. You’ve changed the topic to settings. I’m not sure I want to come along on a tangent where we talk about setting in-and-of-themselves. The article was about why game writing is often bad. I think it is not settings, games often have great settings, but poor stories.