Perhaps it would be more accurate to say that US policymakers deregulated capital flows with China in the hopes that it would lead to political liberalization. Businesses always just follow the money, but for a long time American policy makers had made it difficult to invest in China, from regulatory uncertainty to restrictions on dual use technology exports to high tariffs.

It really was an intentional decision, largely on the part of the Clinton administration, to make investing in the country easier and improve the economic well being of Chinese citizens in the hopes it would inevitably lead to democratization. Clearly, those hopes were just that though

I think China also made it difficult to invest in China.