> It would be practically unenforceable if CA did it, or even the US. The market in both is large, but not large enough, and it's hard to force compliance on companies from other countries.

The U.S. regularly imposes plenty of requirements that are far more difficult to meet, in many industries. The U.S. is the largest market in the world for many goods; I think the parent greatly underestimates the power and practices of national governments. Smaller countries also impose requirements.