Thank you for mentioning the context this manifesto was born in. Somehow it feels like we're backsliding there again, at least in some regards. I don't mean this with my nihilist or doomer tinted lenses on, but something's up right? That's why I'm also very fond of how this book articulates faggot love and resilience, it's just as relevant as I assume it was in the 1970s.
I do have a PDF of F&F, so I think my next step would be to get a print copy. There's some really beautiful editions out there I'd love to actually flip through. I assume the author you mention is Asta, the illustrator? In any case I love that he's cool with the piracy, he's the real deal.
To your point about simulations, I think that's pretty much where I landed too. The simulation have built-in assumptions as you say, and they are taken for granted by many players. So games and especially sim games reproduce certain socio-political discourse by uncritically affirming them. This is despite that fact that they are often completely mythologised and essentially made up. The way most video games treat gender is the most obvious example to me, but there are many for sure.
Anyways, cheers and thank you for the thoughtful comment, I really appreciate it!