Because coordination problems are really hard and that’s what governments and the WTO are for. Also, I’d be very surprised if that kind of coordination didn’t bring national competition authorities down like a hammer on all participants.
Are there? You can’t open a business in China without it being majority Chinese owned. There are plenty of companies doing their manufacturing in China, but every example I know of the wforeigb company contracts the Chinese company to do the manufacturing. Often they’re even further removed, such as Apple who works with a Taiwanese company who just happens to have their manufacturing in China.
Any good China does for its people or for other nations? That will just serve to legitimize their totalitarian government and encourage imitations abroad. Ergo it's bad.
In general it's better to state your fundamental premises at the beginning of the argument rather than reveal them midway through
They just keep getting picked off one by one.