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.
We do depending on the timescale. Sure the planet can naturally sequester carbon again just like before but that is over thousands of years. For people alive right now it is beyond repair because we will all be dead by the time carbon is sequestered faster than it is added.
We know that the planet is warming, we're setting records right now for it and we know why the planet is warming because we can measure the greenhouse gasses in the atmosphere. The GHGs added to the atmosphere over my life so far will never be canceled out through the rest of my lifetime because the rate that we're adding them to the atmosphere.