And with GWS's licensing wing these days, they'd greenlight a game written in BASIC as long as it printed a reasonable enough rendition of the Imperial Aquila to the screen
This is a common misconception, or at least a common conflation of two things. GW actually does do extensive, draconian, Inquisitorial quality control -- but for their IP, not the game itself. Yeah, you could write a program that takes three CPU-months to print an Aquila to the screen, but "reasonable enough" means "complies in every detail." Remember, the fraction of their shot-in-the-dark games that sell are meant to be adverts for the minis first and foremost. You may only have a license for three nameless grots, and they may only be able to do one thing, but by the Emperor they
will be the correct shade of green.
Imagine if you will the bitterest, most troglodytic, most pedantic 40k fan you've ever known. Imagine millions of them, each of them desperately trying to demonstrate that they know more about the tiniest detail of canon than the next and are the only True Fan by finding the most trifling deviation in your work and braying about it eternally as proof that GW has stopped caring and you're a hack and GW's a hack for hiring you and 40k is a joke now and...honestly just a Youtube comments section made manifest.
Now imagine the department officially sanctioned to keep that from happening every time some newbie dev vomits out shovelware with an aquila slapped on it.
They are GW's defense against the Terror. They are the Defenders of Brand Identity. They are GW's IP QC, and they shall know no fear.