I recently read something that played out a thought experiment about "imagine the world could only hold 10,000 people". It may have been a comment somewhere on HN honestly. The idea was that if the world could only hold 10,000 people, there never would have been enough division of basic duties for any one individual to dive so deep that they could invent semi-conductors (insert any modern tech really). I mean we likely wouldn't even have mastered locomotion by now if that was the case.
Lets assume we're "all kids of academics with a successful career, with a relatively safe, secure and stable childhood home and a family background that really incentivizes learning and academic success over succumbing to the pressure of, you know, having an income at some point." Most of us will still just be working on the basic societal problems of producing food and taking out the trash.