Yuval Noah Harari wrote about this rather interesting theory that human rights only picked up steam all of a sudden because the industrial revolution created an economic need for a large class of educated and well-fed workers. We only value our current brand of ethics because it coincides with significant economic advantages. However, it's also important to look at the big picture behind your accusation. If the West truly did not value ethics, you would have been unlikely to have voiced your concerns in this way, since you would not have grown in a framework where these criticisms would be commonplace or even considered a worthy problem to investigate. The mere fact that you are making these observations means it's not so bad from an ethical standpoint. It shows there is already an ethical standard in place that is understood as a commendable ideal by most people, to the point where you can refer to it and expect people to know what you're talking about.

A company leaving a large market will be outcompeted by a company which doesn't; for companies, ignoring profits kills them. If it's anyone's job to respond to China's government, it's other governments', as they can take losses more easily but still not easily enough to get by without coordinated action (easier for governments than companies since there are fewer governments and new states don't form as quickly as new companies.)

I'd hardly claim China cares about ethics, either.

Yeah, that was really strange logic. A does unethical things, B doesn't prevent it therefore B is unethical... but hey maybe A is ethical?