He's got a winning track record. You may not agree with his politics or his morals but that's separate from his effectiveness.
Specifically he's effective at stepping outside the domain he currently operates into create inside another.
What exactly would that be a winning track record in - as near as I can tell, his actual track record is in buying companies with an already-successful product team, and managing not to run them into the ground for a while?
This isn't really a benchmark for effectiveness at anything beyond making money.
I don't think anyone would dispute that he has an eye for investments (helped along by a healthy dose of the ol' silver spoon), not to mention a certain flair for convincing Uncle Sam to pick up the tab (i.e. a significant part of Tesla's growth relied on federal EV subsidies, and NASA heavily buying SpaceX launch capacity).