And that taboo is probably rooted in evolutionary psychology, people have a genetically driven tendency to criticize those who advocate having less children? So could there be an instinctual drive behind it?
https://www.flashpack.com/solo/relationships/dont-want-kids-...
The problem with this line of thinking (and similar ones like „what about China?“) is that it basically absolves you from any responsibility in the matter. After all, there are simply too many people on the planet, what could you possibly do about it?
As other commenters pointed out - the west uses way too many resources compared to their population, and that is a problem.
And it is absolutely possible to have a society that doesn’t drain the planet dry, but not with capitalism :-)