Actually it's not raw fish its cold fish. Raw fish is sushimi, I'll eat sushi in the US, but I wouldn't trust any place in the US to serve me sushimi because we don't have the same level of regulations on fish here that they do in Japan.
In general when I've had authentic food from say Africa and compare it to what Disney passes off, there is a pretty big difference. It may have the same appearance, but generally the stuff at Disney is watered down on the level of spice, probably because they don't think the typical guest can handle the real thing... which is probably true in most place in the US in general. I used to go with some Asian friends to China town in Boston and if I went to those same places by my self I would get foods that were toned down versus what I would get when the waiters knew they were making things for people that knew what the food was supposed to taste like. So no it shouldn't be a surprise that a place like Disney is going to err on the side of caution in their recipes.