Few days ago I've encountered a short quote that had nailed something very important IMHO:
"Walt Disney. Steve Jobs. Bill Gates.
They were all micromanagers. What is it the the most successful leaders micromanaged? They micromanaged product, they didn't micromanage people."
Jim Highsmith, Thoughtworks at ParadigmShift 2014
Musk, Bezos, Jobs & their alikes - obsessed with their vision, people who really know