Sleeping in a bed in a house is certainly the way humans prefer it. But thinking a society with not enough kids can survive and thrive, on the other hand, is wrong, because it is biologically impossible. It’s not a fallacy, it’s harsh truth.
There probably is a society where there are "not enough kids", but it certainly does not come remotely close to current one with over 8 billion humans scraping for resources.
The problem is just that we don't live in ONE society having 8 billion members, but in about two hundred different ones. And being in one of those that are in decline is not exactly a good feeling.
Until the global birth rate is sub-replacement for generations, there's no point in even having this conversation. If the issue is that the "right" kind of people ("native" people in advanced economies) aren't having children, but the "wrong" kind (aka the Global South, immigrants, etc.), then that's just racism. There's no baby shortage -- the ethnic makeup of humanity is simply changing and we will need to erase most of those artificial borders in order to survive. We ARE a single society, and pretending that we're not is a mutual suicide pact.
So when your company is going broke you don't care and are happy because in TV they said that the economy is growing? Are you a company-racist because you want your company to be healthy and non declining? Are you not trading with and appreciating other companies because you only love your own?
The same is with countries and their societies.
I will not be that defeatist to say "my country/my region/my continent can go down because there are others". And to say that is not racist.
Not really sure what you're getting at exactly, but I think you're comparing countries in the world to firms in a market, with the point that I must obviously care about my country's fortunes relative to other countries?
In the current order, I sort of do, but that whole Westphalian order of "countries" is artificial (and also relatively new in its specifics, though of course kingdoms and empires go back far longer): we're all related and share one biosphere, and more recently we share one globalized economy. The truth is that we will sink or swim together -- if we have abandoned houses in Peoria because American-born people aren't having their own children, that is an opportunity to house people who come from somewhere without enough housing or infrastructure. The only barrier to this happening is our suicidal apartheid regime of borders and passports that's even newer than the Westphalian system!
Borders are not erected to help you, an ordinary citizen. They are there to divide you against the ordinary citizens on the other side of them.
