We've held China accountable for counterfeiting products for decades and regulated their exports. So why should Anthropic be allowed to export their products and services after engaging in the same illegal activity?
We have? Are we from different multi-verses?
The one I've lived in to date has not done anything against Chinese counterfeits beyond occasionally seizing counterfeit goods during import. But that's merely occasionally enforcing local counterfeit law, a far cry from punishing the entity producing it.
As a matter of fact, the companies started outsourcing everything to China, making further IP theft and quasi-copies even easier
Whether or not the countermeasures have been effective in practice is a minor detail in the GP point that we would not expect an American company headquartered in the US and conducting significant business in the US to get away with the same thing.