Well, you and similar people know the world is fucked up, but there's a lot more people out there swimming in the ignorance of simply believing everything is fine or that the people raising problems are catastrophising and that everything will somehow work out.

Those people will keep having kids even if basically every sign pointed to the certainty of that kid's life ending early during some kind of traumatic existential struggle.

There's just a percentage of society who simply don't put in much thought beyond their immediate existence and future. That's almost definitely bad in the grand scheme of things, but I guess on the flip side, they potentially live happier lives in ignorance before getting blipped out of existence.