You paint a rosy picture of today, but I'm concerned about the future. Among other things, I expect my kid to see the gulf stream to collapse, and a blue ocean event. Just this year, my area saw an unprecedented heat wave that killed hundreds of people; this is expected to get worse in the years to come. I never had to stay inside during the summer, my kid might need to spend weeks indoors before high school (four days this year). I'm not ready to predict that entire summers will be that dangerous in the pacific northwest, but maybe so in hotter climes.
Politically, the US seems to be gearing up for civil war. Global warming might rapidly flip to an ice age. International conflicts are warming up, and the saber-rattling between the US, Russia, China, and various parties in the middle east is reaching a tenor that's unprecedented in my lifetime. If we have a chance at reversing the climate disaster, it will take an unprecedented level of international cooperation, and I just don't believe that citizens or politicians are ready to get their collective shit together.
> ... your anxiety may not be all that rational and you may want to revisit your decision from time to time!
The die has been cast. I can no longer procreate. I did revisit my decision, and I'm glad to be a (step) parent. If I want more kids, fostering is an option. You might want to reconsider your optimism from time to time, shit's getting real and we don't have a brake pedal.