I'm watching GODZILLA MINUS ONE. You might think it is a movie about a giant undersea monster with nuclear abilities.
But it is actually a movie about survivor guilt in post-WW2 Japan.
The hero is a kamikaze pilot who abandoned his suicide mission. He considers himself a coward. Other characters are struggling with having survived when so many of their family died.
If you deliver the goods in a movie or game, you can do whatever the hell else you want. THE L WORD had sexy lesbians. Lesbians, and lesbian-curious folk, were watching to see sexy lesbians. The writers got away with making their characters really flawed people, because they delivered on the sexy lesbians. Without the lesbian sexiness, network executives would probably have said, "These characters aren't likable, make them nicer." But no one was watching to see nice lesbians, they were watching to see sexy lesbians. So the execs left the writers alone.
Similarly, in GODZILLA MINUS ONE, there is all the nuclear monster spectacle you could ask for. Which means the filmmakers were able to tell a story about survivor guilt. I mean, maybe they started with Godzilla and thought "How can we make Godzilla fresh." But I suspect someone wanted to make a piece about survivor guilt, and then realized they could bring a bigger audience to it by doing it in a monster movie.
Survivor guilt, by itself, is pretty heavy. Who wants to see that? Some people, but maybe not many. But if there's a nuclear monster, then sure! Bring it.
The best horror stories are really proxies for stories about theme that are too bitter to take on directly.
We're working on a war story right now. But we're turning it into a ghost story, because who wants to play a game about how war is horrible?
Deliver the goods, and you are free to do what you want!