It happens to be true, and is a natural consequence of living an an anarchic international system without laws that everyone follows. Larger states are therefore incentivized to project power to advance their interests. This is a central part of structural realism, which is the predominant theory in international relations.
None of that is the same as saying "no one is complicit in anything". Actually, none of that is the same as saying "wars simply happen from time to time" either, like that answers anything. The fact that you're trying to distance the US from
Afghanistan of all things is bad enough.
And who said anything about states being or not being incentivized to project power? Being incentivized to do something is a far cry from not having any kind of responsibilty or even agency. The US chose to invade Afghanistan, and the result was a decades long war that has cost hundreds of thousands of lives and destabilized an entire region. The US also chose to bomb Libya, which had similar effects, though on a much smaller scale. My point was that Norway
also chose to bomb Libya, so we
are complicit. It doesn't matter one bit that we were "just along for the ride". It was a conscious decision and those have consequences.