I'm presumed to not be a cultural fit because I overdressThe dress code for someone applying to some kind of professional job is (in the Western world - not everywhere in the world wears English national dress when they want to look smart) a suit, smart shoes, nice tie (or a female equivalent). Doesn't necessarily have to be the same material for trousers and jacket, but smart trousers and a good condition jacket. That is the dress code for a job applicant.
The dress code for the workplace at which you are interviewing might be different, but you don't work there so that's not your dress code; you're a job applicant at an interview. Someone dressing smartly has gone to the effort of dressing well, and in doing so has indicated that they have prepared for this interview, and that they recognise the formality of it; they are demonstrating basic good manners, and good manners should be a cultural fit in every workplace.
Sadly, I suspect there are workplaces who want you to be psychic and guess how to dress to match them exactly so they think you're "one of them" and mark people down for dressing smartly and not looking just like them, even though you don't even work there. I'd like to say that such workplaces are not worth your time, but sadly it wouldn't be true (although they may well have bought a little bit more into some kind of hipster inspired cargo-cult than you might like). Nonetheless, all you can do is play the probabilities, and on balance dressing smart for a job interview will win you more points than dressing like them.
When I interview, if they're not dressing smartly, it goes against them, even though most people around the office do not dress nearly so smartly.