I have personally experienced while using Claude Code with the "reasoning" models that they are very limited in dealing with causal chains that are more than one level deep, unless specifically prompted to do so. Sometimes they do but more often not. And they can't do any deeper than that. Sure, a human with a specialized knowledge could ask the right questions and guide them but that still requires that human to be present.
I have casual interest in politics and to me it is very surprising the level of strategizing and multi-order effects that major geopolitical players calculate for. When a nation does something, they not only consider what could the responses be from rivals but also how different responses from them could influence other rivals. And then for each such combination they have plans how they will respond. The deeper you go, the less accurate the predictions are but nobody expects full accuracy as long as they can control the direction of the narrative.
LLMs are extremely primitive so using a nuclear strike sounds like a good option when the weapon is at their disposal.