My parents chose to try for kids during a time where global nuclear warfare was almost seen as a certainty.
There will always at all points in time be some doom scenario to worry about.
I mean, climate change is certainly happening. But i'd rather try and make a positive impact on things instead of feeling defeated. I'd rather go down fighting, with or without having kids.
Well, your parents were very horny. Thing is, the possibility of a nuclear war is now the same, if not even higher. And now we know that we fucked up our climate beyond repair. We know that our kids will live in a dystopian wasteland.