I think the more salient question is whether starting a company is the most reliable way to become a self-made millionaire (one of the things they're actually claiming), which could be true even if the chances were low. The parent comment's error (or perhaps an intentional omission if for example they thought it to be self-evident) is in not taking into account the volume of people starting companies vs the volume of people doing other things which could turn them into millionaires.
On that note, I do think there's a flaw in the logic or premises (or unstated assumptions -- maybe "millionaire" is code for some larger quantity of wealth) somewhere. A decade in FAANG with conservative spending habits will easily create a millionaire with a near 100% success rate, and it would be surprising if starting a company would have better odds than that.
On that note, I do think there's a flaw in the logic or premises (or unstated assumptions -- maybe "millionaire" is code for some larger quantity of wealth) somewhere. A decade in FAANG with conservative spending habits will easily create a millionaire with a near 100% success rate, and it would be surprising if starting a company would have better odds than that.