Not having eaten them myself, I would guess the taste isn't quite the same as their smaller cousins served over ice on the half shell. Also, even if they did taste similar, the sheer size would likely make them unappetizing to even the most adventurous westerners.
The Chinese on the other hand are very familiar with the giant pacific variety and have many traditional recipes for them.
It is better for a larger population to consume them all, instead of a smaller one consuming more per individual.
However, shellfish are very good at collecting micro-plastics, which is an unknown risk.
These seem to be the normally eaten oysters everywhere.
I think it's just the Chinese running with a joke.
I think that's taking it a little too far. It's not that crazy a thing to try eating.
The poor danes would have to eat oysters 24/7 to compete with China, and even if they certainly appreciates good food a bit more than most, it might still actually be too much oysters :)
All countries with a great culinary culture tend to use a great variety of ingredients in all their plates.
Most nordics consider oysters as exotic as eating frog, snails, or calf brain - not something they would be caught doing. (You might have more people ready for the Idea in the capitals) so yes, outside of restaurants there is pretty much no demand for oyster.
As for the Chinese, they are shown in the news to eath all kinds of things that there is zero demand for at home - be it types of fish that aren't part of our cuisine, and byproducts of poultry, pigs and others that have traditionaly not been used in food production.
In Belgium (and I'm pretty sure this applies to the UK and France as well), it's not at all uncommon to eat oysters. I don't mind the occasional oyster, but probably couldn't be caught eating calf brain..
It's easy to think of Nordic countries as "big" because they are, after all, "entire countries", but they're really pretty small population wise. Denmark has as many people as Detroit. Norway is similar, Sweden has about twice that population (the total of all 3 being around 20 million people). China has maybe 20 cities that each have more population than Denmark, overall China has about 250x Denmark's population.