An article about Finnish cuisine exists. Because as a concept, we can talk about it.
But in the sense of there being restaurants for it, like Italian, Mexican, Greek, Indian, Chinese, etc cuisines, I would bet quite a lot that you can't find one single restaurant dedicated to "Finnish cuisine" outside of Finland.
It's just that that's not how cuisine is usually understood. But like I said, I wasn't trying to change your opinion, just noted that as usually defined it does exist.
I don't know if you think the colloquial use aligns more with what you said, but in Finnish cuisine is just "keittiö" (as in suomalainen keittiö) or ruokakulttuuri. English word is much the same in that it actually doesn't just mean something fancy, even though as a French origin word it can seem like a fancy word.
I'm just going with that. It's not a personal preference thing. I like Finnish food but it doesn't really matter to me if the term cuisine was reserved for just fancy. I was just saying.