That is why I said 'almost', not 'only'. I'm not personally aware of anything else like this other than starting your own business. And starting a successful bu

That is why I said 'almost', not 'only'. I'm not personally aware of anything else like this other than starting your own business. And starting a successful business is far harder than teaching yourself programming. Computers are not dangerous of themselves, they are dangerous when you rely on them. When you screw up software it's really easy to hit the reset button at no cost. When you screw up fixing a device, it might cost you money. Also in construction you usually need some sort of formal education for the better paying jobs. Plumbers, electricians and so on have certifications, licenses apprenticeship programs.