Not everything is an 8D chess conspiracy mate. If they wanted to do this, they’d wait until OpenAI and Anthropic were at their absolute peaks of investment and then release an open source model that was as good. That’s not what they’ve done at all.
At valuations of about trillion each, I don't know where else they'd go..
China also benefits massively through all of the commodity hardware they make. Sure, they aren't competitive in the chip arms race, but they dominate all the component and power electronics markets. Think about all the power supplies and other commodity components needed to build a gigawatt-scale data centre.