Let me add one thing more, that a realistic aesthetic brings with it certain expectations. For example, I don’t question how Security Bots in Bioshock refuel themselves, or fly, or recognise intruders. I don’t ask how come the turrets in Portal never run out of bullets (though it’s answered as a gag in one of the videos). They’re not presented as realistic, and I don’t expect them to be. But when you make the choice to use realistic miniguns in Talos, those questions are going to bubble up to the surface, like “Where’s the ammo box on that thing?” and “Who’s maintaining these on islands in the middle of nowhere?” and “Scratch that, who’s making them?” and “If Elohim (yeah real subtle name there) did all this then why bother with a machine that requires maintenance in the first place instead of a magic pillar of fire or smth?”
Not only that, but trust from a self contained community is not the same as safe for the general public outside of context. Imagine asking for a summary of the Gamestop shortsqueeze and getting an answer from Superstonks.