> The argument was that Musk was just a lucky incompetent person
That wasn't the argument. The argument was about luck, not competence
> Or you still mean the first, that those say, 10 million Americans at similar wealth
You're assuming all those wealthy Americans decided to throw darts, or threw the same amount of darts. They did not.
If you follow his successes, you can see a repeated cycle: "invested millions or billions of his own money, kept the company afloat for years". You don't get to do that on competence alone.
All of his companies were on the verge of bankrupcy at one point. And lookey lookey, on "competence alone" NASA awards SpaceX a 1.6 billion dollar contract after a single successful launch (after three failed attempts).
As an aside, "Griffin later estimated that SpaceX was around 85% funded by the federal government, mostly through his NASA awards, with the remaining 15% funding split between Elon Musk and other private investors".
Same for Tesla. It existed for 7 years before it delivered its first car. And even by then it was at least 70 million of Musk's own money. And then a huge infusion of government money.
SolarCity. Failed, and bought with Tesla's money.
Neuralink. No idea if it's a failure yet, exists due to Musk's money.
BoringCompany. A non-entity that existed only because of Musk's money, and then due to unlimited investor money (what the US mistakes for "innovation"). It really exists only due to anti-public-transportation lobbying.
And so on.
He exemplifies the quote I posted.