Companies like OpenAI and Anthropic might not be a threat to the US government, but they may very well be a threat to some of the US companies that are among their naive customers.

Open weight Chinese models are first and foremost a threat to the US companies producing closed models and because the US government is bought and paid for by the very same corporations, it tries to make the usage of open models within the US icky and this is an attempt to give that some authority.

Of course we in Europe should completely trust fully closed US models, otherwise tariffs/sanctions will ensure.