The true question is, does it teach you anything about Norwegian culture, and the answer to that is a resounding NOOOOOO! Therefore, it does not belong in Epcot.
To me, if anything, the movies don't belong in Epcot. I don't think you are meant to be "educated" about the countries. I think you're meant to get an introduction, a taste - to pique your interest to possibly (only possibly) inspire further study, and specifically, the country wants your travel dollars when you go to the actual country. If you go the actual Norway to learn about the country, great. But the country doesn't care. They want your tourist dollars. To me, the film is a cross between a commercial and a show on PBS - both equally boring.
But obviously there is a market for that. I understand that, and you don't see me starting a thread railing against boring films in world showcase. I presume originally and/or now, the countries specifically want those films to promote themselves.
And as someone else suggested, you have country sponsors, you have corporate sponsors, and you have IP's.
Before a film director gets to go make artsy fartsy films without regard to profitability, or before a musician gets to make an "experimental" album, they typically have to prove themselves commercially, or do the whole thing in-house on a shoestring budget without the backing of the big companies.
Disney has no intention of being a starving artist.
Personally, I was as bored with those country films as I was with the exploration kiosks, whatever they were called, sponsored by whomever in future world. The former felt very public TV, the latter very school auditorium. I would never pay to see those things.
Maybe big thunder Mountain Railroad is impressive to some people who haven't been on many coasters, but I'm never buying a ticket to Disney to go on that. I went on it once recently and probably not for years before that. It's fine and I like it, but it's a coaster with some theming. Yes, "turning it into" an IP via TV show (i.e. giving it a more explicit backstory) or adding relevant IP characters to it would make it more enjoyable for me. Note "for me."
And if that's "dumbing things down" then we have a problem because I'm not dumb.
ETA: I understand what your saying in terms of Frozen being based of Norwegian properties. I just (personally) feel that those few aspects alone are not justification to claim that the animated film is (or belongs in) a representation (i.e. WS) of Norway.
I appreciate your opinion, but at the same time, I feel they are. I also feel both of our opinions are equally valid.
I have a problem when other people with no credentials or imaginary credentials are sitting here telling me my opinion is wrong.
They aren't just arguing a point theoretically, they're telling me I'm wrong as if that can be proven, with no authority to back it up.
My opinion and guess is that Walt never could have conceived of self-styled super fans chatting on the Internet, analyzing every detail of the parks as they evolved, while promoting their own Disney projects.