Granted.
But right now, a bunch of 40k fans, astro fans, Babylon 5 fans, Star Trek fans, Star Wars fans (and some other fandoms I've missed out) are all looking into Stellaris. What do the tools of cultural critique tell us about that?
We see a game that will let us experience a facet of our favorite series? Or let us experience that series in a new way? For example I'm a Trekkie. I love Trek. I dress up as Riker or Picard for Halloween every year. I've played most of the new games as they came out post 1998 or so, once I was old enough to play computer games and had an allowance that enabled me to save up for and buy said games. I've played games that were good, bad, and ugly, but they all played to my love of Trek. I'm looking forward to Stellaris because it is a Paradox game about Grand Strategy, which I really enjoy. However, I also think that it is a good engine for a Trek experience and I will get to why below.
I think it isn't what Stellaris reflects about us but rather what those series reflect. No one is making a Stellaris overhaul mod of Homeworld. Granted Stellaris isn't out yet but there are Star Trek and Star Wars mods for that game. Stellaris will have the typical draw of 4x with exploration being a strong pull for most. People are curious creatures and we like to find out new things. Trek plays to that what with their new alien of the week. In Stellaris we will get to seek out new life and civilizations in each and every game. And that is exciting. The Federation in Trek is an idealized utopia where many different species come together equally. Stellaris will let us emulate this to an extent. We can work towards that in game and for me, that is great because while the real world has a ways to go to get there, I can try to live up to that ideal in game. I get to live out that fantasy because that is the sort of place I would like to live in.
Stellaris looks to be a great game, and I'm sure it will stand tall on it's own merit. However, the large amount of mods being planned by fans of different series I think isn't the draw game itself per say. It is because the game looks to be a good platform in which others can try to recreate a new experience in a fandom they really enjoy. Stellaris looks to be a good platform for Trek because it allows for Federations to be built, different aliens within the same civilization and seemingly endless exploration and discovery. Like wise, Homeworld was good platform for Trek because it allowed for truly massive ship battles, allowing for a Dominion War recreation.
So I guess I'm trying to say is that Stellaris itself isn't the pull. It's the reputation of Paradox and a general love of sci-fi/grand strategy more than the actual game. The fandoms, I think, would say a lot more about people than Stellaris ever could.
That is if I am understanding what your OP is about. As I said, I'm only a theorist of reception.