I'm absolutely not comparing Sam Altman to any of these leaders, but just to illustrate how much vision and leadership does matter. Consider how stupid these statements sound:
"Jesus didn't build any churches, those were all built by brick layers and carpenters!"
"Pharaohs didn't build a single pyramid, those were all built by artists and workers!"
"Abraham Lincoln didn't free any slaves, he didn't break the chains of a single slave, that was all done by blacksmiths!"
"Martin Luther King Jr. didn't radically improve civil rights, he never passed a single law, that was all done by lawmakers!"
"Sam Altman didn't build ChatGPT, he didn't create a single ML pipeline, it was all done by engineers!"
It's a hard fact of life that some specific individuals play more important roles in successful projects than others.