Depending on your target industry, "a factory" can be as simple as some old yet reliable drill presses and lathes, and then hiring a machinist or two. How is the flexibility to do this "controversial"?
https://youtu.be/xXze8_SzW28?t=431 <---Granted he's got Youtuber money and other gun-sales related money to help, but the concept is the same....he's bootstrapping a factory after purchasing the relevant capital infrastructure using his own money.
> Granted he's got Youtuber money and other gun-sales related money to help
This is the difference. Most Americans don't have access to this capital, or access to means of borrowing this capital, and if they do have the means then they might not necessarily be able to shoulder the risk.
It's not like the capital just fell into his lap from a friendly Wall Street banker. Those businesses are ALSO self-started (to the best of my knowledge), especially his Youtube success. He's a prime example of someone working hard, spending less than they earn, accumulating resources, and then expanding that into ownership of the means of production as well as employing others.
It's not for everyone. Sure, most people have no appetite for the level of risk involved even if they can scrape together the money to buy some revenue-generating asset (I know a guy who left the Marine Corps as a truck driver...moved back to Japan, bought a truck, and then opened a moving company). Most people don't have access to capital....nor will most people ever have the intellect to write tight software code, no matter how many government-backed Code Bootcamp Initiatives there are.
To bring this back to the original point though, telling someone to bootstrap a factory, which is demonstrably doable in the American economy even today (for flexible definitions of "factory"), shouldn't ever be a "controversial" piece of advice. Especially on an pro-entrepreneurship site like YC/HN.
https://youtu.be/xXze8_SzW28?t=431 <---Granted he's got Youtuber money and other gun-sales related money to help, but the concept is the same....he's bootstrapping a factory after purchasing the relevant capital infrastructure using his own money.