Lack of affordable housing, job insecurity and the looming threat of AI and automation, unaffordable healthcare, unaffordable higher education, inflation, trade/culture/cold/proxy wars, societal unrest and thanks to social media the prospect of a global trend towards the collapse of democratic institutions and a march towards authoritarianism. Sure, let me just bring a couple of new humans into the world—people I’m l…
Your life, and the world around you, is objectively better than it would have been in the 1930s, when birth rates didn't fall. So while you may see this as a valid reason/excuse for yourself not to have kids, it doesn't explain broader fertility declines.
C'mon you have the whole answer right here.
Its a prisoners dilemma. People aren't stupid. For any one individual, it makes sense to wait and defer having kids until they're more economically secure. They know that. So what happens when _everyone_ is under that same incentive structure? Well, some people eventually pull the trigger and just yolo it, if they _really_ wanted kids. They probably aren't as economically secure as they wanted to be, but make the personal sacrifices to do it anyway. But you probably also have a lot of people/couples who are depressed that they didn't reach the position they expected to and depressed people generally don't want to have kids.