I don't doubt that copyright serves to cement usa's geopolitical position.
However on a scale of things that maintain usa's geopolitical position, copyright is kind of minor comparatively. Copyright is the long game soft power sort of thing. Ukraine is the short game. USA needs to show the world that if bad things happen to a country because they are friendly to usa, america wont let it go unremarked. If they don't, other countries will take note, and america loses its pax americana position. The ukraine thing is a rather direct challenge of america's hegemonic position. America is responding to it because its either that, or they lose their world position (or a step in that direction).
Im not saying america is above the type of long term power games you suggest, just that in this case they have a much more pressing reason to be involved, and i don't think secret conspiracy reasons make sense when their hand is basically being forced by direct means.
Copyright is actually hard power, like all other economic considerations. Without intellectual property so massively favouring wealthy countries, the US wouldn't be the hegemon, and I mean that literally. IP is hard power, and it is very major indeed.
Imagine a world where Chinese, Russian, Indian and Japanese companies get to sell their goods worldwide without a single care about American patents? If that happened tomorrow, just for one example, BYD would probably become the largest car company in the world (because they have the cheapest and most reliable batteries, but only in China due to IP laws around the chemistry). It would be a direct and immediate challenge to the American hegemony.
However on a scale of things that maintain usa's geopolitical position, copyright is kind of minor comparatively. Copyright is the long game soft power sort of thing. Ukraine is the short game. USA needs to show the world that if bad things happen to a country because they are friendly to usa, america wont let it go unremarked. If they don't, other countries will take note, and america loses its pax americana position. The ukraine thing is a rather direct challenge of america's hegemonic position. America is responding to it because its either that, or they lose their world position (or a step in that direction).
Im not saying america is above the type of long term power games you suggest, just that in this case they have a much more pressing reason to be involved, and i don't think secret conspiracy reasons make sense when their hand is basically being forced by direct means.