Perhaps he means that Musk has the tendency to leave his ego in the driver's seat. One false move, one unlucky moment, and it can cause another tragedy. Otherw

Perhaps he means that Musk has the tendency to leave his ego in the driver's seat. One false move, one unlucky moment, and it can cause another tragedy. Otherwise one person achieving what Musk has is just as good as any other. Just as long as they are stable enough to not pose a risk to the mission.