Comparing working as a W2 employee doesn't really compare to working as a contractor. Getting to choose your own hours, the direction of your project, who you get to work with, etc. is far more valuable to me than a bit more money.
The article is the one that compared the two, saying that he now makes "more". It is completely correct that you cannot directly compare W2+Benefits to Contractor Revenue. The rule of thumb is to add 50% to a W2 salary to include health insurance and other benefits.
I worked as a contractor in 1099 for years. It was exactly the same as W2, except I had to pay estimated taxes 4 times a year. I didn't get to choose hours, direction, who to work with.
I think you're confusing it with personal projects.