No, not alone, but no one but those guys would have done what they did. There were many other barefoot boys tending to horses but it was Genghis who got up there and took over half the world. It wasn't the other kids, it was him. And later on it wasn't his generals, but he who oversaw the conquests. They all could have raised armies instead, but, it was actually him with the vision and singular aim.
Same with Jobs and Masayoshi, other people also knew the people they knew, but only they did do what they ended up doing.
So those are facts, but what is the point that you’re getting at? Are you making the case that their successes were inherent in them, or that their motivations were shaped by some experience unique to them, or were they just destined to be such by history?