The thing people need to realize is that what the author intends is not the same as what the reader interprets.
Fans are absolutely capable of finding meaning and substance to thing the author didn’t add consciously.
Imagine your 10th grad English teacher telling you that the use of the colour blue represents depression. The author didn’t do that consciously, but contextually? It makes fucking sense.
Maybe the author didn’t explicitly say a character wasn’t white, but white readers always assume they are. That doesn’t mean they can’t be coded as, and interpreted as people of Color.
Maybe the author didn’t explicitly say the character was disabled, but context and sustained injuries made them disabled even if the author never conceptualized them in that way.
Maybe a character isn’t specifically said to be mentally ill, but they’re written to have experienced trauma and they’re interpreted by readers as mentally ill.
Authors have no control over the interpretation of their novels, and the argument that it wasn’t consciously and canonically written is ridiculous. Any author will tell you that half the details that emerge are subconscious.
If your subconscious is racist or sexist or transphobic, and in any other way bigoted? It will come out in your writing. And your readers will pick up on it. Which I think is why it’s so important to have marginalized people’s voices involved in editing and publishing.
Just because an author doesn’t mean something to be specifically offensive? Doesn’t mean it isn’t.