I think reading the locked tomb gives a glimpse into what it's like for straight people to exist in a heteronormative society where 99% of media is cishet by default. But, you know, for LGBTQ.
Because a lot of other LGBTQ media, even sci-fi or fantasy, still gives off the feeling that "well, the characters are gay and even if society supports them, being LGBTQ is still rare, still noteworthy.
I'd have to do a proper tally, but I'm fairly certain at least half of the significant characters are explicitly trans, gnc, or homosexual, whereas no character, minor or major, is labeled cishet.
In fact, it's so normal that they have to invent entirely new relationships to discriminate against.
Like, we never read about a character experiencing homophobia, or dysphoria, or struggling with their identity. Whatever a characters identity is, it's written the same way a character would be written as, like, a jock or a book nerd, or someone who likes redheads or rock climbing, or whatever. Theres this feeling that, if we dont know whether a character is queer, its only because Muir didnt mention it. Does that make sense? Is Judith a trans woman? Maybe, but there was never a reason to write dialogue where she says she transitioned. Is babs gay? Is cam aroace? Who could say.
I'd go as far as saying she never explores a characters queer identity (not even her sapphic characters) the same way Stephen King or Jack reacher never explores a characters relationship to heterosexuality.
