The topic here is: how to earn a billion dollars.

There are less than ~5K billionaries in the entire world. Not quite like winning the lottery sure, but still unrealistic for the majority of people.

You're taking the topic so literally that it's disingenuous. For some reason you're acting as if PG's advice doesn't apply to achieving success short of $1B, or as if anything short of $1B is unsuccessful, and we both know neither conclusion is true. So I'm confused what point you're trying to make, exactly.