The question in the title is basically a non-question. AI is quite good at achieving some sorts of stated goals. The easiest way is by exerting the least amount of effort. The least amount of effort ignores ethical concerns. The training around ethical concerns was most likely rather light to start with. If we accept the hypothesis that at some point the AIs are going to be more intelligent than humans it follows that human survival is not a concern and will be ignored as a superfluous concern.