If China and India decide that it is OK to grow CO2 emissions to per capita levels as current US levels or higher, I agree that it is completely moot what we do.
But with significantly higher levels of emissions per capita, we don’t have moral ground to criticize either India or China.
India and China are developing nations with significant energy consumption growth. There is nothing that will change that. There are two ways CO2 emissions can be resolved. Over next 50 years, either we work together and US lowers CO2 emissions to their levels, or developing world increases CO2 emissions to our levels.