Sometimes there's no metaphor.
The Wicker Man comes to mind. It's not a metaphor for anything. It's about the confrontation between Christianity and The Old Ways. There's metaphors in the story that are explained, but the film itself isn't a metaphor for anything. Christopher Lee's character says things elder Pagans taught me to say to Christians. The filmmakers did as much research as they could and cared about portraying the religious practises accurately according to information they had available to them at the time. The way the Christian character behaves, and what he says, is 100% things I have had said and seen done or had done to me and mine. There's no metaphor for anything, it's all right there in the open.
Sometimes there's no fucking metaphor.
Lately I've stopped writing because I feel so trapped by the audience assumption that everything I write will be seen to be, not just a metaphor, but specifically a bad metaphor, for some real-world thing when I am writing about literally what I'm writing about. A changeling is not inherently a Bad Metaphor for being autistic or disabled, writing about a religion is not inherently about Christianity. Vampires are not inherently a metaphor for sex or disability or what-the-hell-ever.
Not everything is a fucking metaphor, and tbh someone thinking everything must a metaphor for something else is a deeply Christian behaviour.
To assume that everything must be a metaphor is a very Christian way of viewing the world, I'm just gonna come out and say it plain. It's an established Christian belief that goes back at least as far as the medieval period, to think that everything in the world was created by their one-god as a metaphor or a parable for them to learn some kind of Christian idea, and that the whole world is meant to serve this purpose at all times.
Y'all need to stop fucking imposing that on everything. If you want that, stick to bible parables. Don't come out here reading stories by non-Christians expecting that's why or how we write stories, and certainly don't come out here combining it with bad faith readings and accusing people of things.
"well but I'm not christian anymore--" a person is what they PRACTISE, not what they say. People can SAY anything! So if you don't like being called christian, stop fucking behaving like one. Actions speak louder than words!
"but death of the author" that means YOU bring projection to the art, and YOU need to take responsibility for your response and interpretation. It isn't MY fault you are bringing a shitty, poisonous, lack of critical thinking to my story, and it isn't my job to soothe you either! death of the author means DEATH. It means grow up and take responsibility for your fucking projected meaning over the fucking text, not "my interpretation is what the author intended and even if it wasn't it's the author's responsibility to respond to me about it". No it isn't. You experience what YOU bring to the art.
Any piece of art will react to you if you react to it. You get from it what you bring to it. It will meet you half-way, but no further. It is alive if you are. It represents something--and so do you. YOU ARE A SPACE, TOO.