Earlier quoted context omitted.
Disagree. There’s so many people who cannot have biological children (for many reasons), so practically speaking a large percentage of those who can should have at least 3 or the population will decline.
Many of us, including the planet under our feet, don't see it as a problem. https://www.populationmatters.org/wp-content/uploads/2018/03... I don't think there was anyone in the 1960s screaming "oh crap... there's only 3 billions of us around here!". We're so used to think the now and here as normal conditions that we lose focus on the global trend which is absolutely disastrous.
Then again, there are other memes that lead not just to lack of reproduction, but directly to the death of the memeholder, so maybe it's not such a big deal. Still, just another thing to wonder/worry about.