It is a mantra here that there is an enormous amount of timing and luck involved in creating a successful startup.
I would expect the majority of people with Musk's skill and ambition to lack his level of financial success. Certainly the percentages will be better than the general population, but it's not guaranteed or even likely.
In my opinion, if people really think timing and luck matter more than skill and determination, then they shouldn't be doing startups (unless their goals aren't to create an awesome/important company, but to have fun or something else).
Timing and luck (from what I have seen) really only seem to matter for things where it doesn't really require a lot of domain expertise. Of course, those are what first time entrepreneurs (at least of the Hacker News variety) are most drawn to, for what should be obvious reasons.
Perhaps it is just due to there being more information about Musk than other founders, but I haven't heard of any YC founders having the level of technical skills and abilities that Musk has. He is older than most, though, and has been at it for a while, so this shouldn't really be surprising.
I would expect the majority of people with Musk's skill and ambition to lack his level of financial success. Certainly the percentages will be better than the general population, but it's not guaranteed or even likely.