You don’t see much organ meats in the Netherlands and the UK much because they are shipped to France where the price is high (and being a part of the EU, the isn’t any extra taxes for that). It’s market choices, not dietary, combined with they were never a huge desire for them there.
It’s also why you don’t really see much chicken feet for sale, they are shipped to China where the price is high.
I think you’re confused. You literally repeated what I said.
I never said that they can’t, it’s that they didn’t normally so they ship it out which now prevents people from developing a taste for it as it now goes out for a higher price.
As for the other part of why Portugal keeps it, it’s for a local market and the issues that deal with it. Think like most Asian nations won’t ship out rice for a higher price on the open market.