This guy was in my family for a decade during his rice up the ladder. Company he worked when I knew him was over 200k employees. He was VP there but he’s CEO at a different giant company now.
Confidence also means they need to have it in you. If you make wrong decisions you won’t be at the top for very long and your company will tank. Not defending CEO’s. Just saying in my experience these people are a different breed and most people would crumble.