For a man who is obsessed with space travel and claims we need to go live on Mars. He doesn't understand how much redundancy is critical to survival in space.
Imagine a sci-fi spaceship... you are light-years away from civilization and any repairs. What if something goes wrong on your ship? Well? There had better be at least a half dozen back up systems to guarantee that you will survive instead of being fucked.
You cannot apply just-in-time supply chain logic to space travel. YOU WILL DIE!
No wonder SpaceX hasn't been able to get out of low-earth orbit.