It's true. I'm objectively more intelligent than my cofounder. He knows it, I know it. He's the far better manager than I am and grew to lead half the company, almost 5x more reports than me.
It's really all about empathy, structure, but first and foremost the ability to pass on the work to _someone else_ and make them succeed at it.
I tend to nerd snipe myself much more often because I like the technical challenges.