Stop looking for reasons to let people of the hook.
The only reason you're assuming I'm letting people off the hook re: climate change is because you've come striding in here convinced that you're the only person Taking It Seriously. As with the pandemic, climate change is not something that is fixable by lecturing people sternly enough on the internet.
But you can't have it both ways here.
Either - human-caused climate change is already, irreversibly, going to plunge us into doom and collapse civilisation, and therefore it's unethical to bring children into that world. This seems to be what you were saying earlier.
Or - human-caused climate change is definitely a bad thing, but not one that will inevitably doom humanity. There are many possible futures. Therefore, it is not immoral to have children on the grounds that they'll inevitably face this hell, because they won't inevitably face this hell - the collapse of human civilisation is not inevitable.
You can't have it both ways - "it's wrong to have kids because the world is definitely ending, but also you're all selfish sods for not doing more to avert this thing I'm telling you can't be avoided now, it's all baked in."