I don't think he wants to head back to the bronze age. The reverse seems to be true; he wants a future where everyone has vast knowledge and a wide set of skills, and everyone has his own CNC multimachines, robots, all that. Why not AI?
But to achieve that, you need to take a few steps back from the technology that is currently operative in large corporations with the capacity to invest millions into it. If they can bring the price point down and simplify the machines enough that they're accessible to everyone, then the capability to produce more and more advanced technology is spread wide. Through open source design, people would share recipes, ideas and improvements into these homemade devices; technology would advance faster and it'd be easier to get machines that solve special problems for which the solution right now would be far too expensive because there's no mass market for it.