When people debate about the economic viability to have children today, buy a house, etc. The discussion mainly focuses on comparisons between wages and prices. And that's okay. It's obviously important.
But that's not the problem; the main problem is: Stability doesn't exist today. For example: Five years ago, learning to code was the main recommendation; a few years later, it's the complete opposite because of AI. Now every few months a new trend comes and you have to adapt. Soon robotics will come, and physical jobs won't be safe either.
We've reached a point where studying for a degree to have a job is a bad idea because you can't guarantee it will still make sense in four years.
But... buying a house today is an investment of 30 years or more, and having a child is an investment of 20 years or more. And a marriage is an investment for life. How can you make those long-term investments if you can't even know if you'll have a job to provide them in 2 or 3 years, regardless of what you do?
You can't, that's the reality. I think that's partly why people today are mostly focused on the short term, like traveling or having fun. If society doesn't allow people to have long-term projects, people are much more likely to develop a "Carpe Diem" way of thinking.
This instability didn't start with AI, it started decades ago, but it's true that AI has taken it to the extreme.
Just my two cents.