No it is not. Current RNI is 1.06% and projections do not suggest it getting down to replacement levels in the next 50 years unless mortality increases substantially.
>Meanwhile, in a half-century, we've doubled the population, while significantly reducing food costs and radically reducing hunger globally.
By destroying vast portions of the natural world and wiping out thousands of species and even putting the future survival of our own species at risk. The "angst" is entirely valid. Destroying the planet to prop up obscenely inflated population levels for absolutely no benefit is horrifyingly evil. The expected population growth in Africa is enough to finish destroying every last spec of natural ecosystem on the planet that is capable of being used for food production. Yes, we absolutely need to address this problem.