Yup, but those two countries alone are still going to hit 1.5 billion combined at current rates (DRC has 6.05 TFR declining at 0.05 per decade), momentum is key. And if they attain European rates of resource consumption then by that point they'll be by far the biggest "problem" as far as "degrowthers" are concerned.

And unlike, say, India, getting that number down is much easier (people resist being killed, but freely distributed contraceptives would likely by welcomed by women).