China already has the largest carbon trading market in the world [0]. Perhaps it's not aggressive enough, but they're significantly more ambitious than the US, and their population isn't nearly as wealthy to begin with, so it'll hurt them more. Either way, we can chose to invest now, or pay the price for this silly game of chicken later.
Besides – how do you suggest we get China and India to cut emissions without doing the same, if not more, at home? Perhaps Border Adjustments [1] can alleviate some of your fears; they would protect domestic industry. All of this has already been worked out to stupendous levels of detail by legal scholars and Nobel-prize winning economists [2] – your armchair criticism just shows that you're decades behind the policy wonks. Leave it to them.
[0] https://en.wikipedia.org/wiki/Chinese_national_carbon_tradin...
[1] https://www.carbontax.org/nuts-and-bolts/border-adjustments/
[2] https://www.nytimes.com/2018/10/08/business/economic-science...