I think a big part of SpaceX successes are due to Elon letting Gwynn Shotwell manage the company.
Look: http://larsblackmore.com/
That's the kind of person who makes spacex successful.
Even his "physics degree" is apparently BS
Sure, you don't build it in a vacuum (I'll see myself out)
I don't think he'd have gone there. But you're right, that a good vision is absolutely going to attract the right talent and make a cohesive company. It's just that's not engineering that's management.