Earlier quoted context omitted.
> And it is insane to me that I'm now seeing this "oh actually teen pregnancy wasn't so bad" thing pop up all over the place. The other side of this is insane to me... the "oh actually looming human extinction won't be so bad" thing. Sub-replacement fertility rates are slow-motion extinction. Animal models where they "bounce back" is irrelevant, those animals have their extremely high above-replacement fertility all…
You don't have to be an "extinction apologist" or whatever to think that we'll probably solve the problem before we go from 7 BILLION people to not enough humans for healthy genetic diversity. We've rescued animal species from extinction with populations of <100.
When it comes to animals - species that refuse to breed have a tendency to go extinct.