While one might argue that there is no single game that scratches the same itches as Star Citizen, I will argue that there are a plurality of games that can collectively scratch the majority of those "itches", and often better.
This standpoint where apparently the very limited and particular itches that SC can scratch are somehow "better" or "preferred" than those in other games is wholly misguided and a direct consequence of SC abusive marketing and BDSSE misrepresentation.
That standpoint very often forgets that there are indeed plenty other games that offer scratching many other fundamental itches that SC still can´t, or does but in a very limited and broken fashion.
You dont need the plurality or collective to debunk it. Many individual single games do already and with a much higher immersion level.
For exemple one of those games offers full persistence, jumping to multiple systems, 1:1 scale model of the galaxy and systems based on astrophysics fundamentals including actual celestial motions (which blows any SC "immersion" out of the water), having full directional control and unconstrained roaming for ship navigation within system, in VR, space anomalies, alien races and ruins with associated gameplay, undertaking exploration gameplay, repairing gameplay, customizing crafted modules, fully working ship control and management systems, reasonably working silent running and detailed countermeasure systems, ability to participate in persistent faction warfare, salvaging or smuggling gameplay, mission generator based on system economy and faction states, wide array of FPS surface building layouts including actual gameplay and settlement interacting features, different types of actual NPC AI and patrols, FPS detailed stealth rules etc, or more generally decent physics or just behaving in a stable manner without crashing, glitching or breaking basic geometries in the game every other minute. Just to name a few more itches that SC can not scratch but another game can.
No single game scratches the itches than this one does. And SC is probably the farthest from it.
Another game out there offers a similar amount of "itches" as above, minus faction warfare, astrophysics fundamentals and a few other things, but adds base building, a ton of additional biomes and survival mechanics among other things.
Again, no single game offers what this one does. And SC is, again, probably the farthest from it.
Another game out there offers to scratch many of the same itches as above but does not have multiplayer although it adds in a very deep and detailed economy, manufacturing and fleet management system.
Again, no single game offers what this one does. And SC is, again, probably the farthest from it.
etc