I agree with you, OP.
Those saying 'we had kids during the bubonic plague' etc - yeah, when contraception wasn't an option, abortion was dangerous or lethal to the mother, marital rape was much more common, etc. Family planning as we know it has only been a real, mostly safe option for ~50 years.
There are so many reasons I don't feel like bringing a child into the world right now would be a good thing - it'd be done because I wanted it, not because I think they'd be entering an improving world that would be a good life for them.
Climate change is already having an effect - whether or not we'll reach the catastrophe point in the next 20-30 years, I don't know, but the IPCC report this week makes clear that things are moving more quickly than we realised. We already see the effects on the weather, on shifting growing zones for crops, on water shortages. Those things will have continued geopolitical and health effects - it might not be 'my hypothetical child dehydrating to death in a barren desert where the Midlands used to be', but the effects of a lot of people being displaced due to water shortages and lack of crops and unliveable climates will be huge.
(I have a friend who works in data modelling in climate change. He's not having kids because he says his conscience wouldn't allow it, knowing the possibilities. Says a lot, to me).
Late stage capitalism and the political landscape in the UK means that financially, things are likely to be pretty tough for any child I had now. I have no wealth to pass on, and am unlikely to have. The health service is stretched and trending toward privatisation, university is an increasingly financially difficult choice I won't be able to help much with, houses are extremely expensive and continue to be despite repeated predictions they will dramatically 'correct'.
Geopolitically things are still shit (as they ever were around the globe, it's just that we're not in the middle of it currently). But I think there's a fair period of building unrest ahead over the next couple of decades because these things are cylical and as new powers rise and the political landscape swings towards a particular side, things tend to get a bit spicy for a bit. China finding its feet as a superpower, Russia vying for its own place, the shift toward rightwing rhetoric in the west.. all of these will have an effect over the coming years.
All things that might not be insurmountable. But added together, these things could make for a very different looking world, and one I don't personally think it's my place to bring someone into just to satisfy my own desire to procreate. Having grown up in poverty, I've seen how these seemingly small shifts can make a huge difference when you're already at the baseline. Having friends who grew up in politically volatile places, how shifts that seem very far away to us right now happen quickly and can be lifechanging overnight.
I personally couldn't bring a child into the world unless I thought I was going to be able to give them better than I had myself and right now that doesn't look possible.
Maybe if you're well-off and able to set your child up with as much as possible to negate some of these issues it's different.