>In fact, this is the standard way to get really rich.
No. The standard way of getting "rich" is to get into a good career that pays a lot. Before Silicon Valley, people got "rich" by working at Wall Street, law or Congress. Getting rich through business is a lottery.
I would have attributed this article from Graham to relative inexperience had he written this early on, say in the 2000s. But him writing this now is just bad-faith preaching intended to give VCs another lottery ticket with a very low success probability of forming a unicorn.
And for the record, 14 and 15 year olds, the best way to get rich is still Wall Street, Congress or law.