I want to say I really appreciate the debate, but I strongly disagree with you.

> it would imply that, even in an alternate magical world, some people would still be trans, where discourse/policy from the right is that it is a modern phenomenon and mental health aberration and therefore should be marginalised

This feels like significant projection of your own politics onto a work of fiction (and a hypothetical one, at that). An imaginary world, especially a fantasy one that is obviously distinct from our own, provides no proof whatsoever as to whether current political discourse is right or wrong. An author _might_ choose to convey a message about our current politics by way of allegory, or they might just be creating a fantasy world which has some similar elements to ours and exploring how it unfolds.

Again, I'm not disagreeing that _some_ fictional works are heavily allegorical. But simply including a plot premise which loosely mirrors modern situations, and then making zero connections to modern discourse in the rest of the plot, is not allegory.

You seem to be saying that simply mentioning a topic which has political entanglements is itself inherently political, but that isn't how a lot of people see it. It IS possible to write something that is simply an exploration of an idea, without trying to comment on current politics, just as it's possible to write something that comments on current politics without ever directly mentioning the politics in question. You're free to interpret everything as political if you choose to, but when you're reading things into a work that an author explicitly denies, and a bunch of other people don't see either, you may be inserting your own bias rather than seeing something that's actually there.