As a general rule, you can safely ignore all economists that try to talk to you about "birthrate decline." Because you know which birthrate they're really talking about.
You don't have to go into the tortured way they bent and abused their data to try to find a slice that supported their views.
LLMs telling people they can talk to Holocaust victims or enslaved people from hundreds of years ago is a repeat of the Guilded Age obsession with seances. It's tarot cards brought to you by tech bros who refuse to read.