Yeah, but US-backed != US-hatched. The proximal cause is that Bolivia had fallen into a state of utter chaos (therefore a power vacuum); the proximal cause of that is that the president tried to pull off a Xi Jingping but this didn't play even with much of the population that initially backed him.
It's the difference between setting a house on fire to acquire the land, and buying a land lot where a house used to be.
