Sylvie's made a very good comparison to food, to a nation's cuisine. You come to other cultures to eat their food. You don't come to eat your food. Yes, big business tourism will rely on giving visitors the food they are accustomed to, in hotels, in busy streets even. Hell, I am happy to find a good Hamburger after 10 years here, to be sure. But to have the cuisine literally be replaced, so that it no longer exists, so that it fits the tastes of foreigners feels like quite a loss, and actually undermines the long term potential of the culture, as an invested tourism destination. You can get that food in any country.
The comparison to fighting styles is not out of place. I remember some fighters who have come to Thailand to learn "real", "authentic" Muay Thai, so to speak. They wanted to get away from the Muay Thai of their countries, where promotions are just "brawling". There was a kind of snobbery (in a good way) about coming to Thailand to fight...and then a few years on I see those very same fighters fighting almost exclusively on shows like Super Champ which are basically Western style shows. They came all the way to Thailand to escape brawl, only to find brawl. It's the same sort of thing. We bring with us our culture, often unconsciously. And we are comfortable with it, just as we are with the foods we like.
I've seen this importation of Western training mindset not only in promotional rings, but in gyms too. Gyms as they hybrid between being commercial tourism houses, and as places that train Thai fighters end up absorbing some of the Western oriented training patterns and values. Thai fighters literally end up being trained more like Westerners. The entire fabric of Muay Thai becoming strained.