That doesn't mean at all that it worked. All that information means is that Chile, now is in a good position relative to the rest of Latin America. Taking conclusions and saying that the reason Chile is the way it is now is due to the US intervention is naive and simplistic. There are so many factors involved in that fact, that it makes little sense to make that argument.

Using the same co-relation you're trying to use, I could say that the intervention was a bad thing, because while Chile is not bad, we could be doing a lot better if it weren't because of the problems we had to face. That is also not the case, and again, too many variables involved that you're freely taking away.