Very few people get rich period. Many more get to the upper middle class, say the top 10-20% of income. And the vast majority of those do so by ordinary employment, not starting a business.
If we go by the numbers and the odds rather than pithy-but-misleading slogans, the easiest, safest path to a higher income is probably acquiring skills that are more rewarded in the labor market.
Which is still far from easy, but there is no easy way to make a lot of money. That much I agree with the article writer on.