It is a product of personality. It takes a certain amount of risk aversion to risk everything to start a company, but that isn't what this is about. This is about investment and it takes selling yourself to convince people to give you money. A good sociopath lives for convincing people to give them what they want without reasonable limits.
Fortunately, most people are not sociopaths, but unfortunately most of these people will not achieve the successes you described.
Maybe they would, if the sociopaths wouldn't assimilate many of those "successes". I consider a certain number of successful businesses to be a relatively stable statistical certainty in a society which provides the necessary environment for them (stable legislation, infrastructure, workers, a market to sell stuff etc.).
The sociopaths now don't increase the total number of these successes, but they tilt the distribution of successes towards themselves as a group, thereby making non-sociopaths less likely to achieve a success.
Fortunately, most people are not sociopaths, but unfortunately most of these people will not achieve the successes you described.