Earlier quoted context omitted.
I don't know why you are falsely implying that Musk's money is not due to great initial capital. If that was true, it would mean that capital for investment doesn't matter, which in turn would mean that we could just as well place a 100% tax on all wealth above a certain level without any detriment. It doesn't though, since your claim is bullshit. Elon's wealth is absolutely based on his parents' success.
His X.com/paypal was not based on his previous wealth and corresponds to the thing that propelled him to later successes.
I'm not actually saying that he's not a great business tycoon, he clearly is based on track record. Plenty of people have the kind of base resources he had without amounting to anything. Either they don't bother to even try or are too stupid or too unlucky too succeed. His parents wealth is still the catapult that launched him to his current success.
There are plenty of people who could have done what he's done but did not because of lack of resources.