The main reason might be that they are worrying about the culture assimilation from other cultures that bring by tourists.
That is because the current trend of globalization that has prompted culture assimilation becoming transnational.
s far as I am concerned, cultural assimilation is inevitable. The only way to reduce the likelihood of being assimilated is to propagate a country's own culture instead of hiding it.
In several places you repeated the phrase
"cultural assimilation" or the word
" assimilation" , which look odd. I think it should be better if you replace by other synonyms i.e
cultural acclimation, cultural ingestion and so on.
Taking Thailand for example, since this country embraced a tourist industry revolution, I have witnessed a phenomenal amount of Thailand restaurants in my hometown, which I never heard of just 5 years ago.
I think
Thai restaurant would be the right phrase instead of
Thailand restaurant as like as
Chinese restaurant instead of
China restaurant .