I completely agree with you. Firstly, it's inevitable that those in developing countries are going to aspire to western lifestyles and that corporations will seek to exploit these markets, thus any argument about the solution being mainly about changing the developed world is flawed. Secondly, we are told that those in the developing world will suffer most from climate change, and thus by not moderating fertility in the developing world we are actually by default causing more suffering. Unless that is, we let them all migrate to the developed world, where they will all adopt western lifestyles, and so we are back to the same problem. It's difficult to take the moral argument against controlling fertility in the developing world seriously (and not think ulterior motives are at play) when said argument falls apart under even a simple analysis. (Supposed) moralists apparently care little about either people or the planet.