This. We're already facing large reductions in population world-wide due to low fertility. Sure, the overall turning point is a few decades away, but it's certain, and in many countries it's in the past.
we are basically in no risk of running down the population within any of our lifetime...
... on the proviso that everything doesn't go pear- shaped.
And with a recognition that those risks of things that might go pear-shaped are probably highly correlated with the carrying capacity of the planet with regards to human population numbers.