It's the same with his humanoid robot. Instead of building yet another useless hype machine, why not simply do vertical integration and build your own robot arms? You have a guaranteed customer (yourself) and once you have figured out the design, you can start selling to external customers.
> why not simply do vertical integration and build your own robot arms?
Robot arms are neither a low-volume unique/high-cost market (SpaceX), nor a high-volume/high-margin business (Tesla). On top of that it's already a quite crowded space.
