I've read the 1st link. It's enuf to respond thus.
Your quote doesn't quite support your claim...
".... isn't a cause for concern in general."
I find the article egregious in its focusing upon
ability to feed a great population growth, while
ignoring deleterious environmental, economic,
& social consequences. They don't consider
the desire of 3rd world countries to live western
lifestyles, & where this will lead with even more
people, exacerbating the problems we now have.
Finally, the article introduces the provocative
"Therefore, the enactment of heavy-handed population-control regulations is not only abhorrent, but is also irrational and unsupported by scientific evidence."
This isn't even on the table in western governments,
yet we see people frightened that this is the threat.
It impedes discussion of the problem.
I don't know about you, but I value the natural
environment. To face its continued degradation
in order to increase the population is really bad
I read about the oceans being denuded of life,
of rainforests being rapidly burned, of macro &
micro plastics being in everything everywhere,
about soaring costs of living in ever more crowded
cities, of land lost to rising seas, of mass extinctions,
ie, the Anthropocene Extinction.
More people means more of those effects. I see
some don't care about that, & want even more people
on the planet. But their lack of concern doesn't mean
"over-population" is bogus or a hoax..only that they're
much less with the effects of population increase.