The NMS gameplay is really only a tiny part of Starfield. It's an RPG. Like, an actual, proper RPG, with tons of actual quests. If you were only interested in the NMS part, flying from planet to planet to scan wildlife and gather resources, sure, you don't need Starfield, NMS will do ya just fine, but there is a fuckton more to the game than that.

And it has VR too! I think NMS and having actual Daggerfall doesn't leave me any room to particularly care about Starfield. I don't get the hype at all.