I tend to see white guilt as hardly an imposed thing. It's something voluntarily taken up by people who feel in some way responsible. It's like Germans feeling guilty for the Holocaust; though the only ones old enough to be any way complicit at this point are mostly nonagenerians.
The thing is, I don't see "white guilt" in the movie at all. I see a movie about environment
guilt crossed with a fantasy of being able to step into an awesome cool body which has nothing to do with skin color. The fantasy of having the chance to become someone else and leave all the crap in your own life behind is quite accessible and Jake here has a physical injury he's trying to get away from which makes it all the more obvious. The fact that he's jumping races seems to me to be almost the excuse to make the rest of the plot work, not the other way around.
So in a way, I do see it as imposed. I don't see anything intrinsic in the movie to classify it as "white guilt" and yet we have articles accusing it as such, apparently because there's a body swap and Cameron is white.