Look: http://larsblackmore.com/
That's the kind of person who makes spacex successful.
Even his "physics degree" is apparently BS
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.
Sure, you don't build it in a vacuum (I'll see myself out)
Electric cars and SpaceX are intrinsically cool to work on, but it remains to be seen whether working on "Twitter 2.0" will be interesting enough for Elon to attract enough talent.
I still think Elon is a brilliant person who (along with teams of other brilliant people) has accomplished incredible things. But as others are saying, think in this case, his ego got the better of him. I'm a software dev, and there is little chance I'd kill myself to build a different version of Twitter.
Good people tend to give others the benefit of the doubt. My personal point of no return is when those children were trapped in a cave, and Elon musk came in to turn that crisis situation into a publicity stunt to further his engineer cosplay.