I think, ironically, this kind of establishment makes street food MORE accessible to people who are wealthy, sheltered, and monocultured. They may want to eat the street food, but they are too scared or intimidated by the culture. This places seems to me the mirror image of a Chef Point Cafe. There's fun in bringing real food to the stuck up, just as there is in bringing fine dining to the people.
Hell, 100 years ago, lobsters were so reviled, there were laws against serving them in prison.