There was probably some of that in the financing of the coup, but what little I saw of the actual people doing it sounded more like culture war - they wanted to suppress indigenous culture and bring back Christianity, things like that.

Note lithium isn't a rare earth element, it's actually pretty common but some sources are cheaper than others. As for Tesla, I believe they don't get lithium from Bolivia and have upcoming chemistries that don't use cobalt at all. Not sure about other EV or phone companies.