This strikes me as the same kind of cope as the people who say the videos of the insurrectionists being allowed in by cops means the videos of them violently assaulting the Capitol...doesn't count?
Musk is an idiot. This is extraordinarily strongly evidenced by his actions and the reports of people who interact with him. He's also a genius at getting investors on board. He works the current system of investment very well. How? Mostly he lies and exploits investor complacency/mythology. He's very good at 'selling', to use the most neutral term I can think of for it, ideas.
If those ideas are good, bad, or fraudulent doesn't seem to make a difference to him. I don't think it is chance that basically all the ideas that can be traced back primarily to him are the ones most clearly bad or fraudulent (apart from Solar City). I don't think it is chance that the most successful of 'his' ventures are ones that have entire teams dedicated to managing him (SpaceX, Tesla) and boards that restrain some of his worse impulses.
Basically, this is a false trichotomy; either he is an idiot, a visionary, or a scam artist. He's all of these things in different contexts. Being an idiot in many, many ways doesn't mean he isn't adapt at selling visions to investors, and neither means he doesn't scam people too. Some critics think his obvious idiocy means his other successes 'don't count'. Some defenders think his successes means his idiocy 'doesn't count'. That's just not how things work.